guillaumeA-9

Problem:
The client was unable to save changes to their menus, and menu language synchronization was not working. They encountered an error code indicating an issue with a regular expression in a WPML file.

Solution:
1. We asked the client to follow the steps provided in a previous support topic, which can be found here: https://wpml.org/forums/topic/wpml-error-16/#post-15333270.
2. We identified that the cause of the issue was incorrect collation in some database tables. After fixing the database collation, the client should be able to add and translate menus as expected.

If you're experiencing similar issues, we recommend trying the steps mentioned above. However, please note that the solution might be irrelevant due to it being outdated or not applicable to your case. If the problem persists, we encourage you to open a new support ticket. We also 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 you need further assistance, please contact us on our support forum: https://wpml.org/forums/forum/english-support/.