I get the following error in my Fedora Linux when I open Tools>Preferences.
Error
An error occurred. Please use Tools > Check Database to see if that fixes the problem.
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Anki 2.1.15 (442df9d6) Python 3.10.1 Qt 5.15.2 PyQt 5.15.6
Platform: Linux
Flags: frz=False ao=False sv=1
Caught exception:
File "/usr/share/anki/aqt/main.py", line 881, in onPrefs
aqt.dialogs.open("Preferences", self)
File "/usr/share/anki/aqt/__init__.py", line 82, in open
instance = creator(*args)
File "/usr/share/anki/aqt/preferences.py", line 25, in __init__
self.setupCollection()
File "/usr/share/anki/aqt/preferences.py", line 80, in setupCollection
f.lrnCutoff.setValue(qc['collapseTime']/60.0)
<class 'TypeError'>: setValue(self, int): argument 1 has unexpected type 'float'