Ubuntu
calibre package

  1. Bug #1899700
  2. Comment #5

Comment 5 for bug 1899700

Revision history for this message
Daniel Letzeisen (dtl131) wrote :

"AttributeError: 'NoneType' object has no attribute 'cancel'"

I think you found another way to hit this bug: https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1898904