Here’s the info it gave:
Error
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Anki 2.1.54 (b6a7760c) Python 3.9.7 Qt 5.15.2 PyQt 5.15.5
Platform: Windows 10
Flags: frz=True ao=False sv=2
Add-ons, last update check: 2022-12-18 09:52:52
Caught exception:
Traceback (most recent call last):
File “aqt.taskman”, line 122, in _on_closures_pending
File “aqt.taskman”, line 71, in
File “aqt.taskman”, line 90, in wrapped_done
File “aqt.sync”, line 117, in on_future_done
File “aqt.main”, line 970, in on_collection_sync_finished
File “aqt.main”, line 956, in _refresh_after_sync
AttributeError: ‘AnkiQt’ object has no attribute ‘flags’