Hello, I have successfully updated a site to Joomla 5 without encountering any issues.
However, I am facing problems with the Behaviour - Backward Compatibility plugin. If I deactivate it, the backend displays an error, and I lose the ability to navigate to any part of the backend. To resolve the situation, I had to reactivate the Behaviour - Backward Compatibility plugin directly from the database.
The site has exclusively installed Gridbox and BaForms. What could be causing this issue?
Thank you.
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