for test, with a local website and menubar extension, i’ve just updated WordPress with the new 5.5 version. The result is that sublevel of menubar does not work anymore…
Do you still maintain the menubar extension ?
Just wondering if your update has been released or will soon be? I have the same issue as the above. Have enabled the jQuery Migrate Helper in the meantime.
I plan to release the updated version of Menubar with WordPress 5.6. As a reminder, these changes don’t affect you if you’re not using the Superfish menu template.