Problem: The client was experiencing a fatal error on their website caused by the WPML String Translation plugin when using PHP version 8.3. The error message indicated an ArgumentCountError due to an incorrect number of arguments passed to a function in the plugin. Solution: We recommended reverting the PHP version from 8.3.10 to 8.0.30 as a temporary fix, which resolved the fatal error and restored site access. Additionally, we advised the client to ensure their site is backed up before making changes and to check for any custom code that might be causing the plugin to load incorrectly. Specifically, they should look for and remove the line
do_action('wpml_before_init');
if found in their theme's functions.php file or any custom plugins.
If this solution does not apply to your case, or if it becomes outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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. If further assistance is needed, please open a new support ticket at WPML support forum.
