Problem: After syncing menus using WP Menu Sync, visiting pages in secondary languages leads to a critical error. This issue is temporarily resolved by deleting the menu translations, which persist on the Front End despite deletion. Solution: Set the URL field in menu items to "Don't translate" as WPML automatically handles URL translation for menu items. If you need a URL field for other purposes, create a separate one with a different name to avoid conflicts. Additionally, remove the value
a:1:{i:0;s:0:"";}
from your theme's code, as it should be a string but is incorrectly formatted as a blank array, causing errors. Ensure that you fully translate the menu and verify its behavior on the Front End. If problems persist, we 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 still occurs, please open a new support ticket.
