Can't export .PSK files

[mg-mods]

Versions
Blender: (example: 3.6.2)
io_scene_psk_psa: 4.2.3 LTS
Describe the bug
When exporting a model for Ready Or Not, with its skeleton and the mesh selected, it doesn't export a PSK file and only returns the message "Saved myfile.blend".

To Reproduce
Steps to reproduce the behavior:

1. Export a mesh as PSK with its skeleton
2. Don't tick "raw mesh data" and "enforce bone name restrictions"; select all bones and click export (check if the output file name is correct before exporting)
3. Blender should return "Saved yourfile.blend"

Expected behavior
Shouldn't I get a .PSK file with my mesh?

Screenshots

Files
Here's my project file if you want to play around. No textures included; please do not share/repost as this is some WIP mod content.
SK_bearcat_rigged.zip