Trouble downloading decks (cards are not being fully uploaded)

Before the error happened, I wasโ€ฆ
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Error message (don't change this)
Anki 24.06.3 (d678e393)  (ao)
Python 3.9.18 Qt 6.6.2 PyQt 6.6.1
Platform: macOS-14.2.1-arm64-arm-64bit

Traceback (most recent call last):

  File "aqt.taskman", line 142, in _on_closures_pending

  File "aqt.taskman", line 86, in <lambda>

  File "aqt.taskman", line 106, in wrapped_done

  File "aqt.sync", line 125, in on_future_done

  File "decorator", line 232, in fun

  File "anki.hooks", line 89, in decorator_wrapper

  File "anki.hooks", line 86, in repl

  File "/Users/sharonmai/Library/Application Support/Anki2/addons21/1322529746/gui/operations/ankihub_sync.py", line 185, in _upload_if_full_sync_triggered_by_ankihub
    if config.schema_to_do_full_upload_for_once() == collection_schema():

  File "/Users/sharonmai/Library/Application Support/Anki2/addons21/1322529746/main/utils.py", line 659, in collection_schema
    return aqt.mw.col.db.scalar("select scm from col")

AttributeError: 'NoneType' object has no attribute 'scalar'

Sentry link (for developers)

Can you describe your problem in more detail? What deck youโ€™re trying to download and how many cards are being downloaded?