Cannot study cards - Error

Getting this error while trying to study. This is with all add ons disabled.
Mac Big Sur

An error occurred. Please use Tools > Check Database to see if that fixes the problem.
If problems persist, please report the problem on our support site. Please copy and paste the information below into your report.
Anki 2.1.45 (355e66e8) Python 3.8.6 Qt 5.14.2 PyQt 5.14.2
Platform: Mac 10.16
Flags: frz=True ao=False sv=2
Add-ons, last update check: 2021-08-14 16:25:37

Caught exception:
Traceback (most recent call last):
File “aqt/”, line 1053, in onStudyKey
File “aqt/”, line 672, in moveToState
File “aqt/”, line 694, in _reviewState
File “aqt/”, line 140, in show
File “aqt/”, line 160, in refresh_if_needed
File “aqt/”, line 199, in nextCard
File “aqt/”, line 233, in _get_next_v3_card
File “anki/scheduler/”, line 49, in get_queued_cards
File “anki/_backend/”, line 44, in get_queued_cards
File “anki/_backend/”, line 131, in _run_command

Selecting a different deck should fix this. I believe this one has already been resolved in .46

I am getting similar errors and it restricts me from studying. I have attempted to toggle off the add ons and restarting anki, it helps for about 5 cards, then a new error pops up. I am using an older MacBook pro but have never had a problem in the past. Please help.

example of what pops up.

An error occurred. Please start Anki while holding down the shift key, which will temporarily disable the add-ons you have installed.

If the issue only occurs when add-ons are enabled, please use the Tools > Add-ons menu item to disable some add-ons and restart Anki, repeating until you discover the add-on that is causing the problem.

When you’ve discovered the add-on that is causing the problem, please report the issue on the add-on support site.

Debug info:

Anki 2.1.35 (84dcaa86) Python 3.8.1 Qt 5.9.7 PyQt 5.13.2

Platform: Mac 10.15.7

Flags: frz=True ao=True sv=2

Add-ons, last update check: 2021-08-14 16:32:07

Caught exception:

Traceback (most recent call last):

File “aqt/”, line 87, in _on_closures_pending

File “aqt/”, line 59, in

File “aqt/”, line 76, in wrapped_done

File “aqt/”, line 114, in on_future_done

File “aqt/”, line 912, in on_collection_sync_finished

File “aqt/”, line 699, in reset

File “aqt/”, line 661, in moveToState

File “aqt/”, line 683, in _reviewState

File “aqt/”, line 65, in show

File “aqt/”, line 110, in nextCard

File “anki/”, line 63, in getCard

File “anki/”, line 261, in _getCard

File “anki/”, line 331, in _getNewCard

File “</Applications/>”, line 2, in _fillNew

File “anki/”, line 638, in decorator_wrapper

File “anki/”, line 635, in repl

TypeError: fillNew() got multiple values for argument ‘_old’

Please follow the steps on When problems occur - Frequently Asked Questions