pip install pyinstxtractor pyinstxtractor target_executable.exe

You may be trying to unpack a file created with a version of PyInstaller that the current extractor script does not yet support.

Sometimes the "cookie" error happens if the file structure is unexpected.

If you can tell me you used to pack the file or if you have access to the original source , I can provide more specific steps. Issues · extremecoders-re/pyinstxtractor - GitHub

The most common cause of this error is using an outdated version of pyinstxtractor against a newer PyInstaller executable.