"Unknown Version of Fallout" after running Anniversary Patcher. How do I fix this?

[bruhmoment000000000]

Hey all.

I'm by no means a skilled modder or good at computer stuff, but I've successfully ran Fallout: New Vegas and Fallout 4 with hundreds of mods, no issues there. But for Fallout 3: GOTY in particular, nothing seems to work. I have ran the game directly through Steam, ran the .exe directly from the files, and mods worked, but weren't perfect; When I try to run the game through Vortex, or even attempt with the FOSE loader, it doesn't recognize my game's version. 

I'm curious if this is because I ran the Anniversary Patcher. The Patcher says not to load the game with FOSE_loader, which seems to be how Vortex runs the game. Nonetheless, it frustrates me to no end and I really just want to play the game properly.

Thanks in advance for any and all help.