Pyinstaller "valueerror: Source Code String Cannot Contain Null Bytes"

I'm getting a ValueError: source code string cannot contain null bytes when executing a command pyinstaller main.py in a cmd both with and without administrator privileges. Traceba

Solution 1:

I figured it out. It seems that pyinstaller isn't compatible with the latest version of Python 3 (as of 24.05.2020). I uninstalled Python 3.8.3 and I installed Python 3.7.7, installed all of the libraries I was using in main.py and it worked! Such a simple solution.