When I try to edit the tags of a question inline, I get an error message:
An error occurred when fetching the tag editor
I have tried both clicking on "Edit tags" and the keyboard shortcut t - both act the same.
In the network tab I see that a request to https://stackoverflow.com/posts/71202402/edit-tags?_=1645432229405 returns a 500 response.
This seems to be a recent issue. The last time I have used the inline tag editing was at 2022-02-21 0700:39Z: link for revision
I am using Firefox 97.0 on Windows.