Can't convert anything

[radozd]

Hello

Tried to convert sources from https://github.com/Rolf-Hempel/PlanetarySystemStacker/
Every file produces the same error:
raise ValueError(f"No {x_name} type in {x_types} with {method}: "
....

Don't know if it can be fixed easily though. I've used python long time ago and cannot get to the details.