Title: Polylang Causes Fatal Errors Last modified: March 20, 2023 --- # Polylang Causes Fatal Errors * [vermiinette](https://wordpress.org/support/users/vermiinette/) * (@vermiinette) * [3 years, 2 months ago](https://wordpress.org/support/topic/polylang-causes-fatal-errors/) * ```wp-block-code I have been using Polylang on this website since November, it worked well until a couple of weeks ago when it started causing errors on the site. I tried to re-install but that didn’t work either. Below is a screenshot of the errors I get. This is worrisome as we were considering upgrading to the pro version since we rely on the plugin for 3 languages, and for other websites. Please let us know what can be done. Below is a preview of the warnings it generates once activated : Warning: Invalid argument supplied for foreach() in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/include/model.php on line 146 Warning: Invalid argument supplied for foreach() in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/include/links-model.php on line 199 Warning: Invalid argument supplied for foreach() in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/include/model.php on line 220 Warning: Invalid argument supplied for foreach() in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/include/model.php on line 220 Warning: Invalid argument supplied for foreach() in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/include/nav-menu.php on line 93 Warning: Invalid argument supplied for foreach() in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/include/nav-menu.php on line 93 Warning: Cannot modify header information – headers already sent by (output started at /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/include/model.php:146) in /home/ekgqle4yullkkmpf/public_html/new/wp-admin/includes/misc.php on line 1416 Warning: Cannot modify header information – headers already sent by (output started at /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/include/model.php:146) in /home/ekgqle4yullkkmpf/public_html/new/wp-includes/functions.php on line 6865 Warning: Cannot modify header information – headers already sent by (output started at /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/include/model.php:146) in /home/ekgqle4yullkkmpf/public_html/new/wp-admin/admin-header.php on line 9Warning: Invalid argument supplied for foreach() in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/include/model.php on line 220lang=”en-US”>Notice: Trying to get property ‘slug’ of non-object in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/connect-polylang-elementor/includes/finder/polylang-category.php on line 91 Notice: Trying to get property ‘name’ of non-object in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/connect-polylang-elementor/includes/finder/polylang-category.php on line 92 Notice: Trying to get property ‘home_url’ of non-object in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/connect-polylang-elementor/includes/finder/polylang-category.php on line 93 Notice: Trying to get property ‘name’ of non-object in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/connect-polylang-elementor/includes/finder/polylang-category.php on line 100 Notice: Trying to get property ‘slug’ of non-object in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/connect-polylang-elementor/includes/finder/polylang-category.php on line 101 Notice: Trying to get property ‘locale’ of non-object in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/connect-polylang-elementor/includes/finder/polylang-category.php on line 102 Notice: Trying to get property ‘term_id’ of non-object in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/connect-polylang-elementor/includes/finder/polylang-category.php on line 108 Warning: array_merge(): Argument #2 is not an array in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/admin/admin-base.php on line 504 Warning: Invalid argument supplied for foreach() in /home/ekgqle4yullkkmpf/public_html/new/wp-content/plugins/polylang-off/admin/admin-base.php on line 523 ``` * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fpolylang-causes-fatal-errors%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 2 replies - 1 through 2 (of 2 total) * Plugin Author [Chouby](https://wordpress.org/support/users/chouby/) * (@chouby) * [3 years, 2 months ago](https://wordpress.org/support/topic/polylang-causes-fatal-errors/#post-16579867) * Hello, * These warnings occur because Polylang receive unexpected data for languages from your database. One possible solution could be to resave your the URL settings in Languages > Settings. This will regenerate the database row where we save the languages cache. There are however a risk that this will not work:1. If a 3rd party plugin filters the data read from the database. In that case, you’ll need to identify the confliting plugin.2. if your database has been corrupted. * Thread Starter [vermiinette](https://wordpress.org/support/users/vermiinette/) * (@vermiinette) * [3 years, 2 months ago](https://wordpress.org/support/topic/polylang-causes-fatal-errors/#post-16644843) * I did the language settings thing which seems to have fixed the errors but now all my URLs give me a 404 error Viewing 2 replies - 1 through 2 (of 2 total) The topic ‘Polylang Causes Fatal Errors’ is closed to new replies. * ![](https://ps.w.org/polylang/assets/icon-256x256.png?rev=3433336) * [Polylang](https://wordpress.org/plugins/polylang/) * [Frequently Asked Questions](https://wordpress.org/plugins/polylang/#faq) * [Support Threads](https://wordpress.org/support/plugin/polylang/) * [Active Topics](https://wordpress.org/support/plugin/polylang/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/polylang/unresolved/) * [Reviews](https://wordpress.org/support/plugin/polylang/reviews/) * 2 replies * 2 participants * Last reply from: [vermiinette](https://wordpress.org/support/users/vermiinette/) * Last activity: [3 years, 2 months ago](https://wordpress.org/support/topic/polylang-causes-fatal-errors/#post-16644843) * Status: not resolved