Error : Unsupported pyinstaller version or not a pyinstaller archive

[andreyrisukhin]

When using this script, I am getting the message Error : Unsupported pyinstaller version or not a pyinstaller archive, even though I have installed PyInstaller. Is there a specific place PyInstaller should be, or a path variable I should modify? Thank you!

EDIT: I ran one of the test files, and it worked. This makes me wonder whether my .exe file was not compiled in PyInstaller. Is this what "...not a pyinstaller archive" means?

[extremecoders-re]

Pyinstxtractor doesn't require PyInstaller to be installed or present on the system path. It's completely standalone and requires just Python.
However, in case the binary is signed and/or modified pyinstxtrator won't be able to work.

These may be applicable -> #9 and https://github.com/extremecoders-re/pyinstxtractor/wiki/Frequently-Asked-Questions#how-to-extract-digitally-signed-exes