Andreas Helmcke

try: sudo patch -p0 -i /PATH-TO-PATCHFILE/taskcoach_gtk3_v3.patch -d /usr/lib/python2.7/dist-packages

Patch works for me too.

Patch https://sourceforge.net/p/taskcoach/bugs/1593/ works for me. Thanks to Max Mopp who mentioned it in his comment on Bug [#1661]

TC on kubuntu 18.04 not starting / does not show any window