An error occured when I press the " custom study " bottom

I’v already turn all add-ons down, and tried to restart anki for several times, but it still doesn’t work.
Have anyone meet with this error before?
I will appreciate it if someone can help me fix this error, thx a lot!!!

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 2.1.44 (b2b3275f) Python 3.8.6 Qt 5.14.2 PyQt 5.14.2
Platform: Windows 10
Flags: frz=True ao=False sv=2
Add-ons, last update check: 2021-07-15 15:26:24

Caught exception:
Traceback (most recent call last):
File “aqt\”, line 40, in
File “aqt\”, line 65, in onRadioChange
AttributeError: ‘Scheduler’ object has no attribute ‘totalNewForCurrentDeck’

Not sure why you’d be getting that error. Please try the 2.1.45 release candidate:

This error disappeared automatically after it downgraded back to Version ⁨2.1.40 (cf446733)⁩.
There may be some bugs in the latest version.
Thank you very much!