FH1 not starting on Xbox One

Hey Guys,

i’m looking on google for 3 hours now, but i can’t find any working solution.
I bought Forza Horizon 1! digitally some time ago but i haven’t played it on xbox one before.

Now, while every other 360 game with backwards compatibility works flawless, FH1 won’t.
It’s not starting at all and telling me, i should insert the disk or download it from the store, when i own the game.
Well…i DID download it from the Store. Iam always online, have an open NAT, have a gold account and every ms account overview tells me, i OWN this game.

But it won’t let met start it.

Tried solutions:

  • redownloaded the whole game 3 times
  • did a [Mod Edit - Abbreviated profanity, profanity and profanity that is disguised but still alludes to the words are not permitted - D] hard reset of my xbox one (redownloading ~500gb :*(
  • tried to start while being offline

i absolutely have no idea.
Is the 360 live services buggy? is it, because i’m online through wi-fi?
please help me :confused: