Yeah...after you try downloading and you get: this operation ‘can’t be completed’
Or after clicking download, and it flashes from download-qued and back to download
click to the bottom right of home button (3 lines) this takes you to a list: ADD HOME ADD TO GROUP MANAGE GAME & ADD-ONNS OFFICIAL CLUB AND X QUIT < click >
Repeat the entire process for either an app (NETFLIX) or another game; physical or digital.
Reload, or reinsert your desired game
click start, mods, and try downloading.
If that does not work, try signing out of your Xbox profile, sign in, click the game in home menu, start, mods and it should work without fail.
-Always try the ‘X quit’ technique first - then sign out/sign in Xbox profile