Trying to pack python application: linuxdeploy::core::elf_file::ElfFileParseError "Invalid magic bytes in file header" #300

Hello, I was trying to pack a python app and when I execute:

./linuxdeploy --appdir AppDir --output appimage --plugin python --executable AppDir/usr/bin/my_script.py

I get:

terminate called after throwing an instance of 'linuxdeploy::core::elf_file::ElfFileParseError'
  what():  Invalid magic bytes in file header
Aborted (core dumped)

The script has a shebang:

#!/usr/bin/env python3

And I also have linuxdeploy-plugin-python in my folder (which maybe this is an issue for that repo, sorry if so).

As there isn't any info searching for this particular error on the internet, I thought I'd post it here to see if anyone can enlighten me on what is going on (this is the first time I try linuxdeploy, and first time I try to create an AppImage (from a docker container that I already have)).

If there is a solution, I wonder if doing the same for a bash script is possible (many times a bash script wraps another binary to provide it some convenience inputs/environment variables).

Thank you for any help and your time!