Daniel Buvens

Problem:
The client receives a warning that the default language must be mapped to a supported language for automatic translation. When attempting to map English to itself, a critical error occurs, but it is not blocking. Additionally, after changing the site's URL, WPML detects a change and requires confirmation. There is also a PHP fatal error related to an undefined method call.
Solution:
1. Temporarily deactivate or delete the current version of the “WPML Multilingual CMS” plugin.
2. Download and install “WPML Multilingual CMS v4.7.0” from the changelog page: https://wpml.org/download/wpml-multilingual-cms/?section=changelog.
3. Navigate to “WPML >> Support” and select the “Yes” option for the message “WPML detected a new address for this site”.
4. Go to “WPML >> Languages > Edit languages” and re-save the settings.
Please ensure to take a full site backup before attempting these steps.

If this solution does not resolve your issue or seems irrelevant due to being outdated or not applicable to your case, we recommend opening a new support ticket. Additionally, 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. For further assistance, please visit our support forum at https://wpml.org/forums/forum/english-support/.