this message came up this morning. I’ve tried going back to old versions/backups of anki and the error still comes up as soon as I do a card, change a setting, etc.
Syncing failed:
Traceback (most recent call last):
File “aqt/sync.py”, line 429, in _sync
File “aqt/sync.py”, line 409, in _abortingSync
File “anki/sync.py”, line 137, in sync
File “anki/sync.py”, line 609, in sanityCheck2
File “anki/sync.py”, line 619, in _run
File “anki/sync.py”, line 546, in req
File “anki/sync.py”, line 479, in assertOk
Exception: Unknown response code: 400