Title: Runtime errors activating maintenance mode Last modified: August 16, 2025 --- # Runtime errors activating maintenance mode * Resolved [Ravi B](https://wordpress.org/support/users/ravibee/) * (@ravibee) * [9 months, 3 weeks ago](https://wordpress.org/support/topic/runtime-errors-activating-maintenance-mode/) * When I activate maintenance mode in LightStart (running on Local), QueryMonitor reports the following error. However, the maintenance mode is active. * Uncaught Error: Call to a member function get_author_permastruct() on null in** C:\Users\ravib\Local Sites\ravibdinky\app\public\wp-includes\author-template. php** on line **368** * Call stack: 1. `get_author_posts_url(1)` wp-content/plugins/wp-optimize/cache/class-wpo-cache- rules.php:262 2. `WPO_Cache_Rules::purge_archive_pages_on_post_update(4727)` wp-includes/class- wp-hook.php:326 3. `WP_Hook::apply_filters(NULL, array)` wp-includes/class-wp-hook.php:348 4. `WP_Hook::do_action(array)` wp-includes/plugin.php:517 5. `do_action('save_post', 4727, WP_Post, true)` wp-includes/post.php:5284 6. `wp_publish_post(WP_Post)` wp-content/plugins/wp-maintenance-mode/includes/ classes/wp-maintenance-mode.php:105 7. `WP_Maintenance_Mode::__construct()` wp-content/plugins/wp-maintenance-mode/ includes/classes/wp-maintenance-mode.php:171 8. `WP_Maintenance_Mode::get_instance('')` wp-includes/class-wp-hook.php:324 9. `WP_Hook::apply_filters(NULL, array)` wp-includes/class-wp-hook.php:348 10. `WP_Hook::do_action(array)` wp-includes/plugin.php:517 11. `do_action('plugins_loaded')` wp-settings.php:578 12. `require_once('C:\Users\ravib\Local...blic\wp-settings.php')` wp-config.php: 103 13. `require_once('C:\Users\ravib\Local...public\wp-config.php')` wp-load.php:50 14. `require_once('C:\Users\ravib\Local...p\public\wp-load.php')` wp-admin/admin. php:35 * When I preview the Local site in incognito mode, the dedicated maintenance mode page (which uses a template with no header and no footer) displays, but shows the following PHP errors in the header and footer areas: * **Header:** * **Warning**: DOMDocument::loadHTML(): htmlParseEntityRef: expecting ‘;’ in Entity, line: 204 in **C:\Users\ravib\Local Sites\ravibdinky\app\public\wp-content\plugins\ wp-maintenance-mode\includes\classes\wp-maintenance-mode.php** on line **1122** * **Warning**: DOMDocument::loadHTML(): htmlParseEntityRef: expecting ‘;’ in Entity, line: 205 in **C:\Users\ravib\Local Sites\ravibdinky\app\public\wp-content\plugins\ wp-maintenance-mode\includes\classes\wp-maintenance-mode.php** on line **1122** * **Footer:** * **Warning**: DOMDocument::loadHTML(): htmlParseEntityRef: expecting ‘;’ in Entity, line: 69 in **C:\Users\ravib\Local Sites\ravibdinky\app\public\wp-content\plugins\ wp-maintenance-mode\includes\classes\wp-maintenance-mode.php** on line **1140** * **Warning**: DOMDocument::loadHTML(): htmlParseEntityRef: expecting ‘;’ in Entity, line: 70 in **C:\Users\ravib\Local Sites\ravibdinky\app\public\wp-content\plugins\ wp-maintenance-mode\includes\classes\wp-maintenance-mode.php** on line **1140** * Deactivating maintenance mode doesn’t cause an error and makes the site display normally. - This topic was modified 9 months, 3 weeks ago by [Ravi B](https://wordpress.org/support/users/ravibee/). Viewing 3 replies - 1 through 3 (of 3 total) * Thread Starter [Ravi B](https://wordpress.org/support/users/ravibee/) * (@ravibee) * [9 months, 3 weeks ago](https://wordpress.org/support/topic/runtime-errors-activating-maintenance-mode/#post-18601905) * **Update**: Although I still get the error when activating maintenance mode, I fixed the error shown when rendering the “Under maintenance” page by making it use a new template that only contains a Content block, with no Header or Footer. * Plugin Support [Kush](https://wordpress.org/support/users/kushnamdev/) * (@kushnamdev) * [9 months, 3 weeks ago](https://wordpress.org/support/topic/runtime-errors-activating-maintenance-mode/#post-18602541) * Hi there, * Thanks for sharing the error details, I’m really sorry you’re having trouble with maintenance mode. * At this stage, I’m unable to reliably reproduce the runtime error you’re experiencing. To help me get there, could you please provide a bit more information? 1. **Plugin version** — Which version of the maintenance mode plugin are you running? 2. **WordPress version** — Are you on the latest WP release? 3. **Activation context** — Are you activating maintenance mode manually, via cron, or through a specific action (e.g., during deployment)? 4. **Server details** — What PHP version and server environment are you using ( Apache/Nginx, hosts like Cloudways, etc.)? 5. **Full error message** — If you can, copy the complete error stack from your debug.log or server logs — it may offer clues. 6. **Steps to trigger it** — Does it occur instantly on activation or only under certain conditions? * With this info, I’ll test more accurately in an environment that matches yours and track down the cause more effectively. * Thank you for your patience. I’m confident we’ll get this resolved together. * Best regards, * Thread Starter [Ravi B](https://wordpress.org/support/users/ravibee/) * (@ravibee) * [9 months, 3 weeks ago](https://wordpress.org/support/topic/runtime-errors-activating-maintenance-mode/#post-18602602) * Hi Kush, here’s the information you requested: - **Plugin version**:  2.6.19 - **WP version**: 6.8.2 - **Activation context**: Manual - **Server**: nginx, Local Version 9.2.6+6872, PHP 8.2.23 - **Error messages**: Pl. see my original post. - **Steps to trigger**: Manual activation from LightStart | General page. * –Ravi Viewing 3 replies - 1 through 3 (of 3 total) The topic ‘Runtime errors activating maintenance mode’ is closed to new replies. * ![](https://ps.w.org/wp-maintenance-mode/assets/icon-256x256.gif?rev=3027645) * [LightStart - Maintenance Mode, Coming Soon and Landing Page Builder](https://wordpress.org/plugins/wp-maintenance-mode/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-maintenance-mode/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-maintenance-mode/) * [Active Topics](https://wordpress.org/support/plugin/wp-maintenance-mode/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-maintenance-mode/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-maintenance-mode/reviews/) * 3 replies * 2 participants * Last reply from: [Ravi B](https://wordpress.org/support/users/ravibee/) * Last activity: [9 months, 3 weeks ago](https://wordpress.org/support/topic/runtime-errors-activating-maintenance-mode/#post-18602602) * Status: resolved