**Before the error happened, I was… uploading and syncing the anking mcat deck

Error message (don't change this)
Anki 2.1.66 (70506aeb) Python 3.9.15 Qt 6.5.0 PyQt 6.5.0
Platform: macOS-14.5-x86_64-i386-64bit
Flags: frz=True ao=True sv=3
Add-ons, last update check: 2024-07-03 14:24:57

Traceback (most recent call last):

  File "aqt.taskman", line 122, in _on_closures_pending

  File "aqt.taskman", line 71, in <lambda>

  File "aqt.taskman", line 90, in wrapped_done

  File "aqt.sync", line 119, 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/cindy/Library/Application Support/Anki2/addons21/1322529746/gui/operations/", line 194, in _upload_if_full_sync_triggered_by_ankihub
    aqt.sync.full_upload(mw, on_done)  # type: ignore

  File "aqt.sync", line 248, in full_upload

  File "aqt.taskman", line 92, in with_progress

  File "aqt.taskman", line 62, in run_in_background

  File "aqt.taskman", line 122, in _on_closures_pending

  File "aqt.taskman", line 71, in <lambda>

  File "aqt.taskman", line 90, in wrapped_done

  File "/Users/cindy/Library/Application Support/Anki2/addons21/1322529746/gui/operations/", line 76, in _on_subdecks_updated

  File "concurrent.futures._base", line 439, in result

  File "concurrent.futures._base", line 391, in __get_result

  File "concurrent.futures.thread", line 58, in run

  File "/Users/cindy/Library/Application Support/Anki2/addons21/1322529746/gui/operations/", line 25, in <lambda>
    task=lambda: build_subdecks_and_move_cards_to_them(

  File "/Users/cindy/Library/Application Support/Anki2/addons21/1322529746/main/", line 70, in build_subdecks_and_move_cards_to_them

  File "/Users/cindy/Library/Application Support/Anki2/addons21/1322529746/main/", line 148, in move_notes_to_decks_while_respecting_odid
    cids ="SELECT id FROM cards WHERE nid={nid}")

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

Sentry link (for developers)

This shouldn’t occur in recent Anki versions.