KeyError: 'labels' results in [73196] Failed to execute script 'gyb' due to unhandled exception!

running normal gam call (gyb --email email@example.com --action restore --local-folder GYB-GMail-Backup-email@example.com/ --service-account results in the following output:

Traceback (most recent call last):
File "gyb.py", line 2767, in
File "gyb.py", line 2258, in main
File "gyb.py", line 1632, in labelsToLabelIds
KeyError: 'labels'
[73196] Failed to execute script 'gyb' due to unhandled exception!

Same thing happenes with mbox restoration.
I am running Got Your Back 1.74

I tried to comment the line out but to no avail.

Start by reproducing the normal Gmail restore and mbox restoration commands with GYB 1.74. Inspect labelsToLabelIds at gyb.py line 1632 and its call from main at line 2258 to determine why the 'labels' key is missing. Done means both restoration paths complete without the KeyError or unhandled-exception message.

Written by the indexing model from the issue text.