[Resolved] Menus dissaper under appearence

Problem:
The client is experiencing an issue where the menus disappear from the 'Appearance' section in WordPress, displaying only 'Create your first menu below', despite already having menus. Additionally, switching the website's language sometimes shows all the menus, but this is inconsistent and depends on the language, specifically Norwegian in this case. Attempts to use WP-menu sync have resulted in crashes, and the menus sporadically reappear and disappear.
Solution:
We recommend trying to synchronize the menus again. However, it's crucial to ensure that you have a backup of your current menu settings before proceeding to avoid any loss of configuration. If you have a backup, we can attempt to restore and fix the menus without using the menu sync feature, which seems to be causing instability. If the issue persists or if you do not have a backup, please visit the WPML support forum for further assistance.

Please note that this solution might be outdated or not applicable to your specific case. We highly recommend checking the related known issues, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the problem continues, do not hesitate to open a new support ticket.