"Your Site is Experiencing a Technical Issue2

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

Problem:
You are trying to edit the 'Theme and Plugins Localization' section on your WordPress site and encountered an E_ERROR in wpml-string-translation plugin due to an unknown format specifier 't'.
Solution:
This issue is recognized as a known problem. Although the specific plugin mentioned in the errata might not be in use, another active plugin could be registering a text domain improperly, leading to this error. For more information and potential solutions, please refer to the errata page: https://wpml.org/errata/flux-checkout-fatal-error-uncaught-valueerror-unknown-format-specifier-t/.

If this solution does not apply to your case, or if it seems outdated, we recommend opening a new support ticket. We also highly suggest checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. For further assistance, please visit our support forum: WPML Support Forum.

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Tagged: Known issue

This topic contains 1 reply, has 0 voices.

Last updated by thomasD-100 2 months, 2 weeks ago.

Assisted by: Andrey.

Author	Posts
June 11, 2025 at 1:26 pm #17126034
thomasD-100	Background of the issue: I am trying to edit the section 'Theme and Plugins Localization' in my WordPress site. I encountered an issue while doing this. Symptoms: An error of type E_ERROR was caused in line 100 of the file /html/wordpress/wp-content/plugins/wpml-string-translation/classes/translations-file-scan/wpml-st-translations-file-registration.php. Error message: Uncaught ValueError: Unknown format specifier 't' in /html/wordpress/wp-content/plugins/wpml-string-translation/classes/translations-file-scan/wpml-st-translations-file-registration.php:100 Stack trace: #0 /html/wordpress/wp-content/plugins/wpml-string-translation/classes/translations-file-scan/wpml-st-translations-file-registration.php(100): sprintf('/html/wordpress...', 'en_US') #1 /html/wordpress/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%', '/html/wordpress...') #2 /html/wordpress/wp-includes/class-wp-hook.php(326): WPML_ST_Translations_File_Registration->cached_save_mo_file_info(false, '%TEXTDOMAIN%', '/html/wordpress...') #3 /html/wordpress/wp-includes/plugin.php(205): WP_Hook->apply_filters(false, Array) #4 /html/wordpress/wp-includes/l10n.php(769): apply_filters('override_load_t...', false, '%TEXTDOMAIN%', '/html/wordpress...', 'en_US') #5 /html/wordpress/wp-content/plugins/wpml-string-translation/classes/MO/JustInTime/MO.php(100): load_textdomain('%TEXTDOMAIN%', '/html/wordpress...', 'en_US') #6 /html/wordpress/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/collect/src/Illuminate/Support/Collection.php(228): WPMLSTMOJustInTimeMO->WPMLSTMOJustInTime{closure}('/html/wordpress...', 0) #7 /html/wordpress/wp-content/plugins/wpml-string-translation/classes/MO/JustInTime/MO.php(96): WPMLCollectSupportCollection->each(Object(Closure)) #8 /html/wordpress/wp-content/plugins/wpml-string-translation/classes/MO/JustInTime/MO.php(78): WPMLSTMOJustInTimeMO->loadTextDomain() #9 /html/wordpress/wp-content/plugins/wpml-string-translation/classes/MO/JustInTime/MO.php(50): WPMLSTMOJustInTimeMO->load() #10 /html/wordpress/wp-includes/l10n.php(196): WPMLSTMOJustInTimeMO->translate('License Key') #11 /html/wordpress/wp-includes/l10n.php(307): translate('License Key', '%TEXTDOMAIN%') #12 /html/wordpress/wp-content/plugins/kadence-blocks/vendor/vendor-prefixed/stellarwp/uplink/src/Uplink/Admin/License_Field.php(84): __('License Key', '%TEXTDOMAIN%') #13 /html/wordpress/wp-content/plugins/kadence-blocks/vendor/vendor-prefixed/stellarwp/uplink/src/Uplink/Admin/Provider.php(106): KadenceWPKadenceBlocksStellarWPUplinkAdminLicense_Field->register_settings() #14 /html/wordpress/wp-includes/class-wp-hook.php(322): KadenceWPKadenceBlocksStellarWPUplinkAdminProvider->admin_init() #15 /html/wordpress/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #16 /html/wordpress/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #17 /html/wordpress/wp-admin/admin.php(176): do_action('admin_init') #18 {main} thrown Questions: How can I resolve the error related to the unknown format specifier 't'? Is there a compatibility issue with the current versions of WordPress, PHP, or the WPML String Translation plugin?
June 11, 2025 at 1:39 pm #17126152
Andrey WPML Supporter since 06/2013 Languages: English (English ) Russian (Русский ) Timezone: Europe/Kyiv (GMT+03:00)	Thank you for contacting WPML support. It seems you’re encountering a known issue that our development team is already aware of. For more information, please refer to the following errata: https://wpml.org/errata/flux-checkout-fatal-error-uncaught-valueerror-unknown-format-specifier-t/ While you may not be using the exact plugin mentioned there, it’s possible that one of your active plugins is registering a text domain improperly, which could be triggering this issue.
June 16, 2025 at 10:16 am #17138039
thomasD-100	Thanks a lot for your help. It works perfectly.