Confirmed. Commit 4bf9de87e700f0de56ef698a8d8d6eb7d4ff9050 does the trick. I applied the patch to kodi 2:20.5+dfsg-2 and built it using sid: The fatal message is gone.
- Bug#1074440: kodi dies with "PyImport_AppendInittab() m... Harald Dunkel
- Bug#1074440: kodi dies with "PyImport_AppendInitta... Dylan Spies
- Bug#1074440: kodi dies with "PyImport_AppendInitta... Harald Dunkel