This is usually a file permission error. Run the Microsoft Store as an administrator.
Improved matchmaking and online session reliability. forza horizon 4 update 1465282 1478564 e upd
Is the issue regarding the update or launching the game? This is usually a file permission error
Sometimes updates get stuck or cause the game to crash. Here are the quickest ways to fix common patch issues. restart your PC or console
Addressed minor stuttering issues on newer PC graphics drivers.
Pause the update, restart your PC or console, and resume.