After Siggi is introduced and added to the Characters description, it is became inaccessible, an error happens in 'screens.py' at line 946.
To fix it:
Edit file 'screens.py' at line 946 like this:
Code:
if knowssigge:
if 'sigismunddead' not in globals():
$ sigismunddead = False
if sigismunddead:
This will eliminate an error.
(It is possible that variable 'sigismundded' was not defined correctly, I found variable 'siggedead' in 'script.py', which most likely have to be 'sigismundded' instead.