Error! Error! Will Robinson!

Traceback (most recent call last):
File "C:\Users\Mark\Documents\GitHub\QSQ\QSO.py", line 427, in <module>
_main()
File "C:\Users\Mark\Documents\GitHub\QSQ\QSO.py", line 28, in _main
doStuff(getInput())
File "C:\Users\Mark\Documents\GitHub\QSQ\QSO.py", line 59, in doStuff
if "new" in usrin:
TypeError: argument of type 'NoneType' is not iterable

Constantly getting this error, swapped the code back to how it was
initially.
still crashes.