This thread is resolved. Here is a description of the problem and solution.
Problem:
The client reported that the translation and synchronization of various navigation menus were not functioning correctly after a PHP version change.
Solution:
1. We recommended creating a full backup of the site and asking the hosting provider to downgrade the PHP version to 8.2, as not all WordPress functionalities are compatible with newer versions. After downgrading, the client should verify if the issue was resolved.
2. We also advised applying a workaround described on the errata page to address string translation issues on the frontend.
If these steps do not resolve the issue or if the solution seems outdated or irrelevant to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix,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. Should the problem persist, please open a new support ticket at WPML support forum for further assistance.
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This topic is split from https://wpml.org/forums/topic/translation-queue-is-not-loading-2/