I ran into some missing imagery during the second visit with Roopah but that stuff doesn't end up in the log and I didn't bother to note it when encountered. However you did forget to initialize visited_harmony and this was a fresh start play through of 0.3b:
I just did a rollback, hand defined it to True in the console since I had visited them earlier and continued on without any other problems.
Code:
File "game/act7b.rpy", line 560, in <module>
elif visited_harmony:
NameError: name 'visited_harmony' is not defined
While running game code:
File "game/act7b.rpy", line 554, in script
if rel_panki:
File "game/act7b.rpy", line 560, in <module>
elif visited_harmony:
NameError: name 'visited_harmony' is not defined