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An error occurred while saving the commentMelinda commented
Same problem, had to go back to 2020 to be able to use the feature normally. One weird workaround is if you try to update one file in Share For Review, then try to update a SECOND file the second one will work, and the first will produce an artifact error.
I don't know if this will work for everyone (I'm on InDesign 16.3 on a Windows 10 PC). Not ideal, but it's a workaround for anyone who needs their files to be able to update ASAP just make a dummy doc, try to update it, then update the one you need to work. Hope it helps somebody out there!