Orbis Interface Problems

[civIVffh2isgreat]

Playing a custom civ in Orbis, at turn 303 the interface refuses to show units and unit commands
Python exception screen shows this:

I'm not very good with python so I'm unsure how to fix this. I know i should've posted this in the Orbis forum, but there haven't been any posts there since 2015 and I'm not really expecting an answer from anyone there.

 

[civIVffh2isgreat]

Fixed, the problem was in the great people screen the mod included with the interface.