[Fo3] Fallout 3 No longer launches with mod manager 2 on steam after recent update

https://youtu.be/aCpkD1PVfYE?si=Bp6AC2OAQNi7a8Ut

I used this guide to install mod manager 2 and all the recommended mods for this game. Well there was a automatic update on fallout 3 goty edition and now it launches with the original game launcher. The game no longer launches with the mod manager and I even tried reinstalling the mo2installer and then I get granted with a Error stating: "Could not find "fallout goty" in any of your steam libraries, make sure the game is installed and that you've run it at least once.

I'm also able to still launch fallout 3 and play my previous save but I do get a warning that some "content is longer longer available". But the game still plays without my mods. Any way to get mod manager 2 to launch again when I launch Fallout goty edition on steam. Thanks