After playing on the cloud for a while, xbox actually offered me to install Exiled Lands again. It looks like that part has been sorted out. Fingers crossed while i’m installing it !
Edit/update: After installing, i was able to play the game again. I don’t know if this solved most issues, but at least i can log in and have fun. The picture of the so called “game cover” on Xbox has also changed appearance. I hope this is solving my issues for now.