Traceback (most recent call last):
  File "/usr/bin/update-manager", line 37, in <module>
    from UpdateManager.UpdateManager import UpdateManager
  File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 54, in <module>
    from .UpdatesAvailable import UpdatesAvailable
  File "/usr/lib/python3/dist-packages/UpdateManager/UpdatesAvailable.py", line 62, in <module>
    from DistUpgrade.DistUpgradeCache import NotEnoughFreeSpaceError
EOFError: EOF read where not expected