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Actually the fix (a couple of lines) can be found in a pull request at the “Contact Author” GitHub site. The author has not responded.
(A broader pre-existing issue with this add-on is that it maps Note names and Card names to a directory tree, but sometimes these will not be legal file names in a given operating system. Especially, the character : is not legal in Windows filenames. But that’s beyond the scope of a simple fix for Anki23.)
As NameLessGO says, this add-on does not seem to be broken, and the original author is also active.
If you are having any problems, it may be that some other Add-ons are interfering.
Try turning off all Add-ons except “Sidebar table” and see if the problem recurs.
Can you update this plugin to the latest version? https://ankiweb.net/shared/info/544982740
( Fast cards reposition)
love your work!! You give Ankiweb exactly what it was missing!
And add-ons by popular authors can easily fail to be repaired because they are advanced. For example, I have tried several times to repair add-ons for Henrik Giesel and Arthur Milchior but failed. It may be possible in the future, but it may be easier to develop new add-ons than to repair them.