@stevimigaku Hey Stevie, it happens whenever I try to grade a Kanji card.

I'm going through Kanji god, marking quite a few as 'known' so they are deleted, but they show up twice and I have to do this option twice. Then when I come across a card that I want to grade pass/fail I get this error and the only way to fix it is to reset card ease.

I'm worried about the long term affects of resetting card ease after every card.

Error
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, repeat 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-ons section of our support site.
Debug info:
Anki 2.1.49 (dc80804a) Python 3.8.6 Qt 5.14.2 PyQt 5.14.2
Platform: Windows 10
Flags: frz=True ao=True sv=2
Add-ons, last update check: 2022-05-14 18:34:24

Caught exception:
Traceback (most recent call last):
File "aqt\webview.py", line 541, in handler
File "aqt\reviewer.py", line 496, in _onAnswerButton
File "C:\Users\wpgsi\AppData\Roaming\Anki2\addons21\1846879528\reviewer.py", line 93, in reviewer_mod_answer_ease
Reviewer_answerCard(self, ease)
File "aqt\reviewer.py", line 422, in answerCard
File "anki\scheduler\v2.py", line 463, in answerCard
File "anki\cards.py", line 117, in flush
File "anki_backend\generated.py", line 936, in update_cards
File "anki_backend_init.py", line 131, in _run_command
anki.errors.NotFoundError