This issue should also be in my latest posted deluge2 installer as used newest components for everything there, so just wanted to add that if you see an error in log a single time upon enabling a plugin, a default or third-party, then can be fully ignored, as just means the plugin description couldn't be read at the time, and error will not show again. My bug-ticket above has an easy code-fix if wanting to fix this(the file to change should here be prepended with 'Lib\site-packages' of install-folder), but as said, you don't need bother, as can be ignored fully.
Just a heads up

Edit: Forgot to say that if using AutoAdd plugin with magnets, then broken in latest dev release, which I reported on bugtracker and also posted fixed version here: viewtopic.php?f=9&t=55968. The windows installer should be affected too, hence mentioning this here also, but again, unless actually using .magnet text-files to be picked up by AutoAdd plugin specifically, then not an issue and can be ignored.