The anki package seems to be broken. This is a platform-independent problem it looks like.
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Traceback (most recent call last):
File "/usr/bin/anki", line 6, in <module>
import aqt
File "/usr/share/anki/aqt/__init__.py", line 14, in <module>
from aqt.qt import *
File "/usr/share/anki/aqt/qt.py", line 17, in <module>
from PyQt5.QtWebEngineWidgets import QWebEnginePage
ModuleNotFoundError: No module named 'PyQt5.QtWebEngineWidgets'
')
Other people with this problem viewtopic.php?f=8&t=11531&p=55332&hilit=anki#p55332
Searching the web for 'No module named 'PyQt5.QtWebEngineWidgets' gives some pointers what the problem might be.