500 Internal Server Error - When accessing 2nd Langauge

This thread is resolved. Here is a description of the problem and solution.

Problem:< You're randomly encountering a 500 Internal Server Error on the WooCommerce pages of the French version of your site after updating all WPML plugins. Solution:

We recommend enabling error logging to identify the specific cause of the 500 error.

To enable it, open your wp-config.php file and look for define('WP_DEBUG', false);. Change it to:

define('WP_DEBUG', true);
define('WP_DEBUG_DISPLAY', false);

To enable the error logging to a file on the server, you need to add yet one more similar line:

define( 'WP_DEBUG_LOG', true );

The errors will be saved to a debug.log file inside the /wp-content/directory.

https://wpml.org/documentation/support/debugging-wpml/

The client responded that recently added "Clear Cart and Sessions" was causing the errors.

This is the technical support forum for WPML - the multilingual WordPress plugin.

Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.

Tagged: Exception

This topic contains 4 replies, has 1 voice.

Last updated by michelR-20 1 month, 2 weeks ago.

Assisted by: Andrey.

Author	Posts
April 16, 2025 at 5:39 pm #16940701
michelR-20	Background of the issue: Je navigue sur la version française de mon site (hidden link) et je rencontre un problème. J'ai mis à jour tous les plugins WPML il y a 13 jours. Symptoms: Erreur 500 Internal Server Error se produit de manière aléatoire, surtout sur les pages Woocommerce sous le menu "Tout-en-UN". Questions: Pourquoi l'erreur 500 se produit-elle sur la version française du site ? Comment résoudre l'erreur 500 sur les pages Woocommerce ?
April 16, 2025 at 5:40 pm #16940718
michelR-20	My Ticket was translated to French. I prefer to work in English. Thx
April 16, 2025 at 5:42 pm #16940742
michelR-20	My Service Provider shared this errorlog: #1 /home/wordpress/doc_root/wp-content/plugins/wpml-string-translation/classes/translations-file-scan/wpml-st-translations-file-registration.php(65): WPML_ST_Translations_File_Registration->save_file_info('%TEXTDOMAIN%', '%TEXTDOMAIN%', '/home/wordpress...') #2 /home/wordpress/doc_root/wp-includes/class-wp-hook.php(326): WPML_ST_Translations_File_Registration->cached_save_mo_file_info(false, '%TEXTDOMAIN%', '/home/wordpress...') #3 /home/wordpress/doc_root/wp-includes/plugin.php(205): WP_Hook->apply_filters(false, Array) #4 /home/wordpress/doc_root/wp-includes/l10n.php(769): apply_filters('override_load_t...', false, '%TEXTDOMAIN%', '/home/wordpress...', 'en_US') #5 /home/wordpress/doc_root/wp-content/plugins/wpml-string-translation/classes/MO/JustInTime/MO.php(100): load_textdomain('%TEXTDOMAIN%', '/home/wordpress...', 'en_US') #6 /home/wordpress/doc_root/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/collect/src/Illuminate/Support/Collection.php(228): WPML\ST\MO\JustInTime\MO->WPML\ST\MO\JustInTime\{closure}('/home/wordpress...', 0) #7 /home/wordpress/doc_root/wp-content/plugins/wpml-string-translation/classes/MO/JustInTime/MO.php(96): WPML\Collect\Support\Collection->each(Object(Closure)) #8 /home/wordpress/doc_root/wp-content/plugins/wpml-string-translation/classes/MO/JustInTime/MO.php(78): WPML\ST\MO\JustInTime\MO->loadTextDomain() #9 /home/wordpress/doc_root/wp-content/plugins/wpml-string-translation/classes/MO/JustInTime/MO.php(50): WPML\ST\MO\JustInTime\MO->load() #10 /home/wordpress/doc_root/wp-includes/l10n.php(196): WPML\ST\MO\JustInTime\MO->translate('License Key') #11 /home/wordpress/doc_root/wp-includes/l10n.php(307): translate('License Key', '%TEXTDOMAIN%') #12 /home/wordpress/doc_root/wp-content/plugins/kadence-blocks/vendor/vendor-prefixed/stellarwp/uplink/src/Uplink/Admin/License_Field.php(84): __('License Key', '%TEXTDOMAIN%')
April 16, 2025 at 5:53 pm #16940750
michelR-20	Here is another Error Log from April 14th: [14-Apr-2025 13:57:24 UTC] PHP Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /home/wordpress/doc_root/wp-content/plugins/wpml-media-translation/classes/media-usage/class-wpml-media-usage.php:39 Stack trace: #0 /home/wordpress/doc_root/wp-content/plugins/wpml-media-translation/classes/media-usage/class-wpml-media-post-media-usage.php(55): WPML_Media_Usage->add_post(27837) #1 /home/wordpress/doc_root/wp-includes/class-wp-hook.php(326): WPML_Media_Post_Media_Usage->update_media_usage(27837, Object(WP_Post)) #2 /home/wordpress/doc_root/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #3 /home/wordpress/doc_root/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /home/wordpress/doc_root/wp-includes/post.php(5060): do_action('save_post', 27837, Object(WP_Post), true) #5 /home/wordpress/doc_root/wp-includes/post.php(5162): wp_insert_post(Array, false, true) #6 /home/wordpress/doc_root/wp-admin/includes/post.php(453): wp_update_post(Array) #7 /home/wordpress/doc_root/wp-admin/post.php(227): edit_post() #8 {main} thrown in /home/wordpress/doc_root/wp-content/plugins/wpml-media-translation/classes/media-usage/class-wpml-media-usage.php on line 39
April 17, 2025 at 1:22 pm #16944156
Andrey WPML Supporter since 06/2013 Languages: English (English ) Russian (Русский ) Timezone: Europe/Kyiv (GMT+03:00)	Thank you for contacting WPML support. Could you activate the debug.log and see what is there at the moment of the error? To enable it, open your wp-config.php file and look for define('WP_DEBUG', false);. Change it to: define('WP_DEBUG', true); define('WP_DEBUG_DISPLAY', false); To enable the error logging to a file on the server, you need to add yet one more similar line: define( 'WP_DEBUG_LOG', true ); The errors will be saved to a debug.log file inside the /wp-content/directory. https://wpml.org/documentation/support/debugging-wpml/ But before, can you test the following workaround? https://wpml.org/faq/why-is-htaccess-getting-overwritten-with-the-language-folder-on-my-wpml-website/ Before making any changes, please ensure that you back up your database first.
April 17, 2025 at 6:50 pm #16945636
michelR-20	Thanks Working with your suggestion and my service provider, the new plugin I resently addeded "Clear Cart and Sessions" was the causing the errors.