Title: 500 Internal Server Error. Optimize css Last modified: April 29, 2020 --- # 500 Internal Server Error. Optimize css * [it1ivan](https://wordpress.org/support/users/it1ivan/) * (@it1ivan) * [6 years, 1 month ago](https://wordpress.org/support/topic/500-internal-server-error-optimize-css/) * When you enable css compression, the frontend gives an error of 500. A new WordPress and Autoptimize plugin are installed on the site. I use VDS with the following finishes vestacp-centos-6-x86_64 PHP Version 7.2.1 System Linux tz-video.ru 2.6.32-042stab140.1 #1 SMP Thu Aug 15 13:32:22 MSK 2019 x86_64 Build Date Feb 23 2018 14:59:54 Server API CGI/FastCGI Virtual Directory Support disabled Configuration File (php.ini) Path /etc/php72 Loaded Configuration File /etc/php72/php.ini Scan this dir for additional .ini files /etc/php72/php.d * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2F500-internal-server-error-optimize-css%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 6 replies - 1 through 6 (of 6 total) * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [6 years, 1 month ago](https://wordpress.org/support/topic/500-internal-server-error-optimize-css/#post-12749406) * OK, some questions; * What errors are in your PHP errorlog? * What happens if you untick “also aggregate inline CSS”? * What happens if you disable “aggregate CSS”? * frank * Thread Starter [it1ivan](https://wordpress.org/support/users/it1ivan/) * (@it1ivan) * [6 years ago](https://wordpress.org/support/topic/500-internal-server-error-optimize-css/#post-12755223) * 188.93.67.237 – – [30/Apr/2020:06:25:54 +0300] “GET /wp-admin/plugins.php?plugin_status =all&paged=1&s HTTP/1.0” 200 54771 “[http://wp.tz-work.ru/wp-admin/plugins.php”](http://wp.tz-work.ru/wp-admin/plugins.php”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” 188.93.67.237 – – [30/Apr/2020:06:25:56 +0300] “GET /wp-admin/options-general.php?page=autoptimize HTTP/1.0” 200 58358“ [http://wp.tz-work.ru/wp-admin/plugins.php?plugin_status=all&paged=1&s”](http://wp.tz-work.ru/wp-admin/plugins.php?plugin_status=all&paged=1&s”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” 188.93.67.237 – – [30/Apr/2020:06:25:56 + 0300] “GET /wp-admin/load-scripts.php?c=1&load%5Bchunk_0%5D=hoverIntent,common, hoverintent-js,admin-bar,svg-painter&ver=5.4.1 HTTP/1.0” 200 27989 “[http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”](http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” 188.93.67.237 – – [30/Apr/2020:06:26:00 + 0300] “GET / HTTP/1.0” 500 1241 “[http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”](http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” 188.93.67.237 – – [30/Apr/2020:06:26:06 + 0300] “POST /wp-admin/options.php HTTP/1.0” 302 – “[http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”](http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” 95.142.39.188 – – [30/Apr/2020:06:26:06 + 0300] “GET /?ao_speedup_cachebuster=51808 HTTP/1.0” 200 27972 “[http://wp.tz-work.ru/?ao_speedup_cachebuster=51808”](http://wp.tz-work.ru/?ao_speedup_cachebuster=51808”);“ WordPress/5.4.1; [http://wp.tz-work.ru”](http://wp.tz-work.ru”); 188.93.67.237––[ 30/Apr/2020:06:26:06 +0300] “GET /wp-admin/options-general.php?page=autoptimize& settings-updated=true HTTP/1.0” 200 58537 “[http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”](http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” 188.93.67.237 – – [30/Apr/2020:06:26:42 + 0300] “GET / HTTP/1.0” 200 38922 “[http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”](http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” 188.93.67.237 – – [30/Apr/2020:06:26:48 + 0300] “GET /wp-admin/admin-ajax.php?action=autoptimize_delete_cache&nonce=d4e721fef0&_ =1588217165380 HTTP/1.0” 200 4 “[http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”](http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” 188.93.67.237 – – [30/Apr/2020:06:26:52 + 0300] “GET / HTTP/1.0” 200 38920 “[http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”](http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” 188.93.67.237 – – [30/Apr/2020:06:27:08 + 0300] “POST /wp-admin/admin-ajax.php HTTP/1.0” 200 47 “[http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”](http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” 188.93.67.237 – – [30/Apr/2020:06:28:08 + 0300] “POST /wp-admin/admin-ajax.php HTTP/1.0” 200 47 “[http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”](http://wp.tz-work.ru/wp-admin/options-general.php?page=autoptimize”);“ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36” * Thread Starter [it1ivan](https://wordpress.org/support/users/it1ivan/) * (@it1ivan) * [6 years ago](https://wordpress.org/support/topic/500-internal-server-error-optimize-css/#post-12755235) * If I uncheck – then error 500 does not occur [https://prnt.sc/s8d2g4](https://prnt.sc/s8d2g4) [https://prnt.sc/s8d30r](https://prnt.sc/s8d30r) [https://prnt.sc/s8d3b7](https://prnt.sc/s8d3b7) * link log [https://cloud.mail.ru/public/6eAA/kgsd4xGX7](https://cloud.mail.ru/public/6eAA/kgsd4xGX7) * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [6 years ago](https://wordpress.org/support/topic/500-internal-server-error-optimize-css/#post-12755662) * nothing relevant in the error log-file, no idea what is happening I’m afraid it1ivan; there’s almost no CSS to optimize but for reasons I don’t understand the CSS minifier seems to be crashing :-/ * Thread Starter [it1ivan](https://wordpress.org/support/users/it1ivan/) * (@it1ivan) * [6 years ago](https://wordpress.org/support/topic/500-internal-server-error-optimize-css/#post-12755723) * How can I solve the problem? Maybe something is wrong with the VDS setting * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [6 years ago](https://wordpress.org/support/topic/500-internal-server-error-optimize-css/#post-12755734) * no idea to be honest; I’ve never seen an server have issues with the minification of that small amount of CSS and there are no indications in the error-log that can help pinpoint a specific issue. Maybe -wild guess here- try upgrading to a more recent PHP-version? from what I hear 7.4 is pretty stable and quite a lot faster? Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘500 Internal Server Error. Optimize css’ is closed to new replies. * ![](https://ps.w.org/autoptimize/assets/icon-256X256.png?rev=2211608) * [Autoptimize](https://wordpress.org/plugins/autoptimize/) * [Frequently Asked Questions](https://wordpress.org/plugins/autoptimize/#faq) * [Support Threads](https://wordpress.org/support/plugin/autoptimize/) * [Active Topics](https://wordpress.org/support/plugin/autoptimize/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/autoptimize/unresolved/) * [Reviews](https://wordpress.org/support/plugin/autoptimize/reviews/) ## Tags * [fastcgi](https://wordpress.org/support/topic-tag/fastcgi/) * 6 replies * 2 participants * Last reply from: [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * Last activity: [6 years ago](https://wordpress.org/support/topic/500-internal-server-error-optimize-css/#post-12755734) * Status: not resolved