Hello,

 We're aware that there are some problems currently with updating to the latest patch for Two Point Museum for Xbox Players.

 We're currently investigating the issue and will update as soon as we have more information.

 In the meantime, some players have found that re-installing the game has helped, or going to network settings and selecting "go offline" prior to starting the game.

 We're very sorry for the inconvenience and hope that this is solved ASAP so everyone can continue playing!

Many thanks, 

Jo & the Two Point team

Going offline will not help you if you purchased the game digitally. 

And reinstalling isn't a guaranteed fix either. Even installing on a different Xbox will not fix the issue.