I keep getting an error message if I try to add cards to deck or even close anki. Please help

I keep getting this error message when I try to close the anki browser. I cannot close it or add more cards to my deck. Please help
This is the error message
Anki 2.1.35 (84dcaa86) Python 3.8.0 Qt 5.14.2 PyQt 5.14.2
Platform: Mac 10.15.5
Flags: frz=True ao=False sv=?
Add-ons, last update check: 2020-11-05 19:32:25

Caught exception:
Traceback (most recent call last):
File “aqt/webview.py”, line 493, in handler
File “aqt/editor.py”, line 483, in
File “aqt/addcards.py”, line 222, in afterSave
File “aqt/editor.py”, line 508, in fieldsAreBlank
File “anki/notes.py”, line 87, in model
File “anki/models.py”, line 174, in get
File “anki/rsbackend_gen.py”, line 426, in get_notetype_legacy
File “anki/rsbackend.py”, line 262, in _run_command
pyo3_runtime.PanicException: called Result::unwrap() on an Err value: “PoisonError { inner: … }”

That seems to be indicating that something went wrong before that message, and Anki has gotten into a stuck state. Did you get another error message before it? Please force Anki closed, and if problems persist, please paste the first error you get.