X Box Series X Compatability

I uninstalled the game then reinstalled it and it works now. That link doesn't explain why it would be compatable with my series X but not my Xbox one X. If it's compatable with the newer box surely it would be with the older box. Or have I simplified things too much? Anyways it's working now

Assuming the backwards compatibility is near seamless for the Xbox One titles, it will be a grand start for the Series X range.

I'm assuming that the Series X is based on the same type of architecture as the Xbox One/X, so it should be a lot of easier to have Backwards Compatibility work right out of the box instead of needing to make an emulator like they had to do for Xbox 360,
and original Xbox Backwards Compatibility.

I'm really looking forward to finding out more!

It will probably become backward compatible with series x. In this moment the backward compatibility project for xbox one has been stopped, waiting for series x

And, if it were not backwards compatible, you might have to wait until the release of Xbox Series X, as they have said they have stopped working on bringing Backwards Compatible titles to Xbox One until the Series X launch to get Backwards Compatibility
up and running on the Series X. Form there, I imagine they will move back to bringing titles to both Series X and Xbox One for a few more years.

Xbox one isn't xbox one s or x compatible they are all compatible it's only the x that has some enhancements but generally the game will download on any xbox one

Series x is just xbox series s or x

Not xbox one s