Problem: You are trying to install WPML and translate your site but encountered an E_ERROR in the WPML String Translation plugin. The error indicates a TypeError in the SettingsRepository.php file because no default language was set in the WPML configuration. Solution: First, check your WPML configuration by navigating to WPML > Languages > Edit languages. Ensure all languages are listed correctly and not missing, then resave the settings. If you have not started your translations, consider either resetting WPML from WPML > Support > Troubleshooting > Reset WPML at the bottom or reinstalling it manually using the .zip file of the plugin for both WPML and String translation, which you can download from here.
Please note that this solution might be outdated or not applicable to your specific case. 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 the issue persists, please open a new support ticket.
