Better to just use a save converter prior to loading the saves; from brief inspection these are compressed (0x1150E, 0xA29C) which is not one of the raw supported filetypes.
Can't support every oddball emulator/etc especially if they run with their own formats. Gotta be raw save files.
Oops, I am such an idiot, I was checking the wrong bridges!
I wasted so much of my life trying to figure this out consulting guides and walking around everywhere.