@chayabenyehuda according to your other post your error message is [‘git’, ‘branch’, ‘—show-current’] and that makes sense since you said it only started when you udpated.
The change required is not in your script though, it’s in the PsychoPy source code. You need to find the code in
C:\Program Files\PsychoPy3\lib\site-packages\psychopy\projects\pavlovia.py
and change it as indicated here: