Bought fallout 3 on my Xbox one now I can't save game or sign in

I might have gotten my fallout 3 code but I do not remember and now I can't buy fallout 3 so now I need my fallout 3 code again

Hello! I bought The consol with fallout 4 cd at the time fallout 4 was relesed and I got the code for fallout 3 with it. Fallout 3 is an xbox 360 game from The start could that be a problem trying to download to xbox one?

Makes no sence selling a box with fallout 4 to xbox one and a redeem code for fallout 3 to xbox 360 😑👈

Just bought a 3 month subscription of Xbox live gold and now I can't sign into my profile? What's the problem?

So I got it to work finally, here’s what I had to do:

1. Download Fallout Shelter onto my Windows Laptop

2. Start the game and save over the downloaded sync file

3. Shut down my laptop

4. Turn on my Xbox One

5. Delete my local save file for Fallout Shelter on my Xbox One

6. Restart my Xbox One

7. Launch Fallout Shelter on my Xbox One

8. After being prompted, select “Sync my latest data.”

9. Game works.

Well mine changed for an unknown reason. I have had my xbox for a couple of months. I bought halo 5 fallout 4 and a few other games. One day, all of a sudden i couldnt play any of my games. It kept saying "couldnt load latest saved data". No one had an answer,
so I factory reset my xbox one and now when i tried to sign in with my email i think i put the wrong password and i think it just made a new account with my old accounts email because now i am trying every email i could possibly have used for my live account
but the only one i ever used is now signing in to this brand new account with none of my games on it :'(