Mnemosyne won't launch

[Brendan Carroll]

Error from command line launch:

Log body:
 An unexpected error has occurred.
Please forward the following info to the developers:

Traceback (innermost last):
  File "/usr/local/bin/mnemosyne", line 4, in <module>
    __import__('pkg_resources').run_script('Mnemosyne==2.7.3', 'mnemosyne')
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 665, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1463, in run_script
    exec(code, namespace, namespace)
  File "/usr/local/lib/python3.8/dist-packages/Mnemosyne-2.7.3-py3.8.egg/EGG-INFO/scripts/mnemosyne", line 150, in <module>
    from PyQt5 import QtWebEngineWidgets # Needs to happen first for some reason.
 ImportError: /lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.15' not found (required by /home/brendan/.local/lib/python3.8/site-packages/PyQt5/QtCore.abi3.so)

Lenovo Yoga 720
Ubuntu 20.10 Groovy
Mnemosyne v 2.7.2+

I expected the program to launch.
The program didn't launch.