Title: critical errors since install Last modified: March 4, 2025 --- # critical errors since install * Resolved [pigsound](https://wordpress.org/support/users/pigsound/) * (@pigsound) * [1 year, 3 months ago](https://wordpress.org/support/topic/critical-errors-since-install/) * yesterday i installed the Inactive Logout plugin. today the website does not work properly anymore: sometimes after hitting the login button the critical error comes up, sometimes on changing to another page in the backend, sometimes a plugin cannot be activated because of a critical error. and between all of these error, the page works again. then another error comes up. the front page does not work at all. i am cluesless. the website runs with wp 6.7.2 and php 8.1. i already switched all plugins off and changed the theme. i suspect the inactive logout plugin to somehow interfere with the wordfence plugin that i also have installed on this site.here is the error log: * ```wp-block-code 2025-03-04 10:22:17.767073 [INFO] [84258] [T0] [77.118.145.93:50266:HTTP2-41#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:22:13.830486 [INFO] [84259] [T0] [2001:608:e00:72::127:0:49960#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:22:09.726656 [INFO] [84258] [T0] [77.118.145.93:50266:HTTP2-39#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:22:04.180804 [INFO] [84258] [T0] [77.118.145.93:50266:HTTP2-37#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:21:37.017607 [INFO] [84258] [T0] [77.118.145.93:50266:HTTP2-33#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:20:33.841375 [INFO] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64507:HTTP2-243#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:20:28.557095 [INFO] [84258] [T0] [77.118.145.93:50266:HTTP2-5#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:20:25.816524 [INFO] [84258] [T0] [77.118.145.93:50266:HTTP2-3#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:19:05.874517 [INFO] [84259] [T0] [2001:608:e00:72::127:0:53832#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:18:18.345002 [NOTICE] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64507:HTTP2-207#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Uncaught Error: Call to a member function set() on null in /home/website-directory/public_html/wp-includes/l10n.php:856\nStack trace:\n#0 /home/website-directory/public_html/wp-includes/l10n.php(959): load_textdomain()\n#1 /home/website-directory/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()\n#2 [internal function]: WP_Fatal_Error_Handler->handle()\n#3 {main}\n thrown in /home/website-directory/public_html/wp-includes/l10n.php on line 856\n2025-03-04 10:18:13.598456 [NOTICE] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64507:HTTP2-203#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1113468928) (tried to allocate 65400832 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 10:18:03.801568 [NOTICE] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64507:HTTP2-199#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1111371776) (tried to allocate 81793024 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 10:17:35.374126 [NOTICE] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64507:HTTP2-181#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1132343296) (tried to allocate 65400832 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 10:14:30.650282 [INFO] [84258] [T0] [2001:608:e00:72::127:0:51982#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:12:16.578507 [NOTICE] [84259] [T0] [77.118.145.93:50140:HTTP2-11#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Uncaught Error: Call to a member function set() on null in /home/website-directory/public_html/wp-includes/l10n.php:856\nStack trace:\n#0 /home/website-directory/public_html/wp-includes/l10n.php(959): load_textdomain()\n#1 /home/website-directory/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()\n#2 [internal function]: WP_Fatal_Error_Handler->handle()\n#3 {main}\n thrown in /home/website-directory/public_html/wp-includes/l10n.php on line 856\n2025-03-04 10:11:24.907329 [NOTICE] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64467:HTTP2-53#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1165549568) (tried to allocate 132161536 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 10:10:04.238909 [NOTICE] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64462:HTTP2-11#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Uncaught Error: Call to a member function set() on null in /home/website-directory/public_html/wp-includes/l10n.php:856\nStack trace:\n#0 /home/website-directory/public_html/wp-includes/l10n.php(959): load_textdomain()\n#1 /home/website-directory/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()\n#2 [internal function]: WP_Fatal_Error_Handler->handle()\n#3 {main}\n thrown in /home/website-directory/public_html/wp-includes/l10n.php on line 856\n2025-03-04 10:09:13.623380 [NOTICE] [84258] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64449:HTTP2-145#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Uncaught Error: Call to a member function set() on null in /home/website-directory/public_html/wp-includes/l10n.php:856\nStack trace:\n#0 /home/website-directory/public_html/wp-includes/l10n.php(959): load_textdomain()\n#1 /home/website-directory/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()\n#2 [internal function]: WP_Fatal_Error_Handler->handle()\n#3 {main}\n thrown in /home/website-directory/public_html/wp-includes/l10n.php on line 856\n2025-03-04 10:09:10.362536 [NOTICE] [84258] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64449:HTTP2-141#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1127952384) (tried to allocate 98754560 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 10:07:19.076149 [NOTICE] [84259] [T0] [114.119.141.24:33807#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 10:04:00.883681 [NOTICE] [84259] [T0] [77.118.145.93:50093:HTTP2-77#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Uncaught Error: Call to a member function set() on null in /home/website-directory/public_html/wp-includes/l10n.php:856\nStack trace:\n#0 /home/website-directory/public_html/wp-includes/l10n.php(959): load_textdomain()\n#1 /home/website-directory/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()\n#2 [internal function]: WP_Fatal_Error_Handler->handle()\n#3 {main}\n thrown in /home/website-directory/public_html/wp-includes/l10n.php on line 856\n2025-03-04 10:03:56.828034 [NOTICE] [84259] [T0] [77.118.145.93:50093:HTTP2-75#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1130049536) (tried to allocate 98754560 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 10:02:53.035006 [INFO] [84259] [T0] [77.118.145.93:50093:HTTP2-55#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:02:31.741896 [NOTICE] [84259] [T0] [77.118.145.93:50093:HTTP2-45#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 966615040) (tried to allocate 191066112 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 10:02:21.441684 [NOTICE] [84259] [T0] [77.118.145.93:50093:HTTP2-43#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1090326528) (tried to allocate 50544640 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 10:01:51.457920 [INFO] [84259] [T0] [77.118.145.93:50093:HTTP2-33#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:01:36.628980 [INFO] [84259] [T0] [77.118.145.93:50093:HTTP2-31#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 10:01:26.745069 [INFO] [84259] [T0] [2001:608:e00:72::127:0:45434#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:59:35.824161 [INFO] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64373:HTTP2-353#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:59:30.536229 [INFO] [84258] [T0] [2001:608:e00:72::127:0:57626#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:58:57.677199 [INFO] [84258] [T0] [2001:608:e00:72::127:0:59468#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:58:47.119058 [INFO] [84259] [T0] [77.118.145.93:50093:HTTP2-19#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:57:45.922046 [INFO] [84259] [T0] [77.118.145.93:50093:HTTP2-17#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:53:55.130228 [INFO] [84259] [T0] [77.118.145.93:50093:HTTP2-9#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:53:53.677171 [INFO] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64314:HTTP2-301#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:51:43.699799 [NOTICE] [84258] [T0] [2001:608:e00:72::127:0:57606#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 09:48:47.192428 [INFO] [84258] [T0] [77.118.145.93:49855:HTTP2-205#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:48:13.262025 [INFO] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64280:HTTP2-235#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:46:56.214740 [INFO] [84258] [T0] [77.118.145.93:49855:HTTP2-201#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:46:49.435545 [INFO] [84258] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64271:HTTP2-311#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:45:51.386313 [NOTICE] [84258] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64271:HTTP2-287#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Uncaught Error: Call to a member function set() on null in /home/website-directory/public_html/wp-includes/l10n.php:856\nStack trace:\n#0 /home/website-directory/public_html/wp-includes/l10n.php(959): load_textdomain()\n#1 /home/website-directory/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()\n#2 [internal function]: WP_Fatal_Error_Handler->handle()\n#3 {main}\n thrown in /home/website-directory/public_html/wp-includes/l10n.php on line 856\n2025-03-04 09:45:45.829739 [NOTICE] [84258] [T0] [77.118.145.93:49855:HTTP2-199#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1127952384) (tried to allocate 98754560 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 09:44:47.334949 [INFO] [84258] [T0] [77.118.145.93:49855:HTTP2-197#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:43:51.743608 [INFO] [84258] [T0] [2001:608:e00:72::127:0:56618#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:43:49.214461 [INFO] [84258] [T0] [77.118.145.93:49855:HTTP2-195#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:43:31.157333 [NOTICE] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64246:HTTP2-333#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1125855232) (tried to allocate 98754560 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 09:42:46.227963 [INFO] [84258] [T0] [2001:608:e00:72::127:0:38408#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:37:56.618683 [INFO] [84259] [T0] [2001:608:e00:72::127:0:58068#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:35:56.768028 [INFO] [84258] [T0] [2001:608:e00:72::127:0:45484#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:34:46.042744 [INFO] [84258] [T0] [2001:608:e00:72::127:0:59054#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:31:04.966534 [INFO] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64172:HTTP2-79#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:30:02.992862 [INFO] [84258] [T0] [2001:608:e00:72::127:0:53546#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:29:57.489923 [NOTICE] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64170:HTTP2-63#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1115451392) (tried to allocate 90464256 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 09:27:16.251752 [INFO] [84258] [T0] [77.118.145.93:49855:HTTP2-157#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:26:33.127715 [NOTICE] [84258] [T0] [77.118.145.93:49855:HTTP2-145#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1027497984) (tried to allocate 199520256 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 09:26:07.610768 [NOTICE] [84258] [T0] [77.118.145.93:49855:HTTP2-143#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1109282816) (tried to allocate 81797120 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 09:25:46.325041 [INFO] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64118:HTTP2-27#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:25:44.429223 [INFO] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64118:HTTP2-25#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:25:30.246485 [INFO] [84258] [T0] [77.118.145.93:49855:HTTP2-133#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:25:21.424236 [INFO] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64118:HTTP2-3#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:24:52.474303 [INFO] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64112:HTTP2-221#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:24:48.724648 [INFO] [84258] [T0] [77.118.145.93:49855:HTTP2-123#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:23:54.613110 [INFO] [84259] [T0] [2001:4bc9:1f93:5dfd:12b:d4dd:89a8:f5e7:64107:HTTP2-95#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:22:05.508962 [INFO] [84258] [T0] [2001:608:e00:72::127:0:33698#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:22:00.951718 [INFO] [84258] [T0] [77.118.145.93:49855:HTTP2-55#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:21:20.244958 [INFO] [84259] [T0] [77.118.145.93:49877:HTTP2-7#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:21:19.832335 [INFO] [84259] [T0] [77.118.145.93:49877:HTTP2-11#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:21:19.331553 [INFO] [84259] [T0] [77.118.145.93:49877:HTTP2-5#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:21:18.221905 [INFO] [84259] [T0] [77.118.145.93:49877:HTTP2-3#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:21:17.026862 [INFO] [84258] [T0] [77.118.145.93:49855:HTTP2-39#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:20:59.545454 [INFO] [84259] [T0] [2001:608:e00:72::127:0:49644#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 09:19:22.102142 [NOTICE] [84258] [T0] [77.118.145.93:49828:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1176039424) (tried to allocate 132161536 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 08:46:16.927868 [NOTICE] [84258] [T0] [2001:608:e00:72::127:0:53418#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 08:39:30.336378 [INFO] [84258] [T0] [2001:608:e00:72::127:0:56332#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 08:21:41.982372 [NOTICE] [84258] [T0] [216.244.66.233:41834#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1165897728) (tried to allocate 65400832 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 07:35:16.960248 [NOTICE] [84259] [T0] [216.244.66.233:46156#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1136476160) (tried to allocate 15007744 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 07:11:33.931601 [NOTICE] [84258] [T0] [54.36.148.254:63367:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Uncaught Error: Call to a member function set() on null in /home/website-directory/public_html/wp-includes/l10n.php:856\nStack trace:\n#0 /home/website-directory/public_html/wp-includes/l10n.php(959): load_textdomain()\n#1 /home/website-directory/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()\n#2 [internal function]: WP_Fatal_Error_Handler->handle()\n#3 {main}\n thrown in /home/website-directory/public_html/wp-includes/l10n.php on line 856\n2025-03-04 07:11:32.414315 [NOTICE] [84258] [T0] [54.36.149.35:31833:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1088184320) (tried to allocate 90460160 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 06:58:54.750693 [NOTICE] [84258] [T0] [207.46.13.54:19919:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 06:52:56.962781 [NOTICE] [84258] [T0] [216.244.66.233:57720#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 06:17:47.932709 [NOTICE] [3959816] [T0] [157.55.39.200:23601:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 06:16:16.041010 [NOTICE] [3959817] [T0] [157.55.39.200:20933:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 05:56:28.359052 [INFO] [3959817] [T0] [2001:608:e00:72::127:0:47104#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 05:56:24.846666 [INFO] [3959817] [T0] [2001:608:e00:72::127:0:47094#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 05:53:39.466600 [NOTICE] [3959817] [T0] [54.36.148.168:60231:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 05:47:30.922165 [INFO] [3959816] [T0] [2001:608:e00:72::127:0:38768#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 05:47:16.877605 [NOTICE] [3959817] [T0] [2001:608:e00:72::127:0:34680#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 05:47:12.555005 [NOTICE] [3959817] [T0] [62.138.3.52:41261#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1138446336) (tried to allocate 6295552 bytes) in /home/website-directory/public_html/wp-content/plugins/wp-typography/vendor-scoped/mundschenk-at/wp-data-storage/src/class-transients.php on line 169\n2025-03-04 05:27:11.830398 [NOTICE] [3959816] [T0] [66.249.70.99:64698#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1027493888) (tried to allocate 199516160 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 05:15:39.576518 [INFO] [3959816] [T0] [2001:608:e00:72::127:0:49876#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 04:54:59.078824 [NOTICE] [3959817] [T0] [54.36.148.78:53347:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 04:33:27.521600 [NOTICE] [3744255] [T0] [17.241.227.16:46012#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1052659712) (tried to allocate 199516160 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 04:26:13.591642 [NOTICE] [3744255] [T0] [2a03:2880:f800:5:::39564:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 04:02:29.075611 [NOTICE] [3744254] [T0] [62.138.3.52:36729#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 03:47:55.529044 [NOTICE] [3744254] [T0] [54.36.148.82:56825:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1209589760) (tried to allocate 132161536 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 03:47:11.026532 [NOTICE] [3744254] [T0] [47.82.11.163:55758-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1077829632) (tried to allocate 199520256 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 03:36:10.602857 [INFO] [3744254] [T0] [2001:608:e00:72::127:0:55378#APVH_my-website.xy:443] File not found [/home/website-directory/public_html/503.shtml]2025-03-04 03:33:35.632198 [NOTICE] [3744254] [T0] [62.138.3.52:50989#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 03:33:06.006511 [NOTICE] [3744254] [T0] [157.55.39.197:17489:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: serialize(): Cannot use output buffering in output buffering display handlers in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 03:28:37.523368 [NOTICE] [3695974] [T0] [216.244.66.233:44888#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1207566336) (tried to allocate 132161536 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n2025-03-04 03:20:19.236284 [NOTICE] [3695974] [T0] [54.36.148.62:40859:HTTP2-1#APVH_my-website.xy:443] [STDERR] PHP Fatal error: Out of memory (allocated 1127825408) (tried to allocate 44126208 bytes) in /home/website-directory/public_html/wp-content/plugins/litespeed-cache/src/object.lib.php on line 736\n ``` * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcritical-errors-since-install%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 2 replies - 1 through 2 (of 2 total) * Plugin Author [Deepen Bajracharya](https://wordpress.org/support/users/j_3rk/) * (@j_3rk) * [1 year, 2 months ago](https://wordpress.org/support/topic/critical-errors-since-install/#post-18363546) * Hi * I could not replicate the issue. * Are you certain that Inactive Logout is causing this? I see there are notices related to litespeed plugin from the logs but not any triggered from inactive logout plugin. Are there any other references to how this might have happened? If yes, send them to [support@inactive-logout.com](https://wordpress.org/support/topic/critical-errors-since-install/support@inactive-logout.com?output_format=md) so that we can take a deeper look. * Thread Starter [pigsound](https://wordpress.org/support/users/pigsound/) * (@pigsound) * [1 year, 2 months ago](https://wordpress.org/support/topic/critical-errors-since-install/#post-18364738) * hi, thanks for your reply. in the meantime we turned off litespeed and this stopped the site from crashing. so the problem does not seem to be related to the Inactive Logout plugin. Viewing 2 replies - 1 through 2 (of 2 total) The topic ‘critical errors since install’ is closed to new replies. * ![](https://ps.w.org/inactive-logout/assets/icon-256x256.png?rev=3133765) * [Inactive Logout](https://wordpress.org/plugins/inactive-logout/) * [Frequently Asked Questions](https://wordpress.org/plugins/inactive-logout/#faq) * [Support Threads](https://wordpress.org/support/plugin/inactive-logout/) * [Active Topics](https://wordpress.org/support/plugin/inactive-logout/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/inactive-logout/unresolved/) * [Reviews](https://wordpress.org/support/plugin/inactive-logout/reviews/) ## Tags * [critical error](https://wordpress.org/support/topic-tag/critical-error/) * 2 replies * 2 participants * Last reply from: [pigsound](https://wordpress.org/support/users/pigsound/) * Last activity: [1 year, 2 months ago](https://wordpress.org/support/topic/critical-errors-since-install/#post-18364738) * Status: resolved