Similar to Issue #276: Import removing Retroarch entries

[L-28]

Cartridges removes Retroarch games after the have been successfully added

Reproduction not guaranteed, but I think it has something to do with this:
Import Retroarch games
Download a game through Retroarch/Online Updater/Content Downloader
Import again, and the Retroarch games will be removed

Log File:
cartridges-1.log

OS: Arch Linux
Installation Method: AUR, though the Flatpak has similar issues
Version: 2.10.1

[L-28]

I think I managed to find the Error:
Retroarch had Unicode invalid characters in the "base_content_directory": "HERE WERE THE UTF-8 INVALID CHARACTERS I UNFORTUNATELY DELETED THEM one of them was xf4", portion of the playlist file(s).

Once removed the importer works without issues.

[L-28]

The Error happened again the offending characters were "åu" this time (again in base_content_directory) seemingly happens when one downloads the thumbnails over the online updater (as the error happened even though I didn't download games through the Content downloader)

It's seemingly a problem on retroarch's end. (Though there is hopefully a way to mitigate it in the python importer)