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[carsten <1884525@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1898904 ***
    https://bugs.launchpad.net/bugs/1898904

OS xubuntu 20.04 LTS

when I try to start calibre I get the following output

~$ calibre
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 543, in main
    listener = create_listener()
  File "/usr/lib/calibre/calibre/gui2/main.py", line 514, in create_listener
    return Listener(address=gui_socket_address())
  File "/usr/lib/calibre/calibre/utils/ipc/server.py", line 110, in __init__
    self._listener._unlink.cancel()
AttributeError: 'NoneType' object has no attribute 'cancel'

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https://bugs.launchpad.net/bugs/1884525

Title:
  Cannot start calibre

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