calibre crashes on start

[dan]

In Kubuntu 20.04 calibre 4.99.4+dfsg+really4.12.0-1build1 crashes on start.

Expected: calibre window opens
What actually happened:
Traceback (most recent call last):
  File "/usr/bin/calibre", line 20, in <module>
    sys.exit(calibre())
  File "/usr/lib/calibre/calibre/gui_launch.py", line 73, in calibre
    main(args)
  File "/usr/lib/calibre/calibre/gui2/main.py", line 529, in main
    app, opts, args = init_qt(args)
  File "/usr/lib/calibre/calibre/gui2/main.py", line 114, in init_qt
    app = Application(args, override_program_name=override, windows_app_uid=MAIN_APP_UID)
  File "/usr/lib/calibre/calibre/gui2/__init__.py", line 875, in __init__
    raise RuntimeError('Failed to load the progress_indicator C extension, with error: {}'.format(pi_err))

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[InfoLibre (david-vantyghem)]

See https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1898904