https://github.com/K4sum1/xl-converter/tree/stable
Basically theoretically every part should work on Windows XP, modded Python 3.8, my modded QT 5.16/PySide2, modded/older versions of dependencies required for the program, etc. However the last roadblock is PyInstaller and I'm not sure how to fix it.
My first attempt was just to take the version the program uses (6.1) and fix missing functions, so I did that and this version can be found here below.
https://github.com/K4sum1/pyinstaller/commits/6.1.0/
However building and running the program I get an Unhandled exception in script window that is just blank. There's no text or anything.

From what I can understand this seems to be PyInstaller related, and everything else I know runs on XP. (Well outside of the PySide2 build, but seeing as the QT5.16 it's based off of runs on XP idk why Python bindings for it wouldn't)
I did some research and on the MSFN thread where I got the modded Python 3.8 for XP, a user mentioned using PyInstaller 4.10, so I tried that, but I can't get it working here.
https://msfn.org/board/topic/183741-python-3813-for-windows-xp-sp3/page/5/#comment-1279582
So I don't really know what to do from here. I don't get any log, running it in cmd doesn't give me any output. I don't know how to get older versions working or what to do.
The only thing I can think of is if there is a basic PyInstaller test program I could make and use to test PyInstaller on XP easily before working on getting xl-converter to run. However I don't know where to find something like this, or if it even exists.
Please help, I don't know what to do here.