If your post-Joomla 4 migration site has an extra blue menu toggle box at the top of every page in backend, this might be the fix you are looking for!
The Joomla Forum thread I mention in this video: https://forum.joomla.org/viewtopic.php?t=991458
If your post-Joomla 4 migration site has an extra blue menu toggle box at the top of every page in backend, this might be the fix you are looking for!
The Joomla Forum thread I mention in this video: https://forum.joomla.org/viewtopic.php?t=991458