Whoops. A critical error has occured. This is most likely a bug in Qubes Manager. TypeError: disconnect() failed between 'currentIndexChanged' and all its connections at line 279 of file /usr/lib/python3.5/site-packages/qubesmanager/settings.py. ---- line: self.netVM.currentIndexChanged.disconnect() func: apply line no.: 279 file: /usr/lib/python3.5/site-packages/qubesmanager/settings.py