Made my Xbox my "home" Xbox, now all games on my other Xbox are unplayable

A lot of people are having the same issue right now, so there may be an issue with the service, but Xbox hasn't updated their status page for it yet. http://xbox.com/status

I don't know if you'll still have that issue with Roblox, but it should go back to working how it was.

The Home setting is what allows you to share games with other profiles. Since you made the Series X your Home, it removed the One as your Home which is what is not allowing your kids to access your games. You can only have 1 console set as your Home at a time.

Thanks for the heads up - thankfully it rectified itself!

Annnddd it's back - but now flipped.

After the fix (thank you @Smwutches), everything was working well on both my Xboxes. We've been playing them both daily since December 23rd without any issues.

Today both my kids and myself played my Series X repeatedly without any issues - bouncing between both Game Pass and purchased games.

After my kids finished playing, I took over and was playing my Series X, but had to soft restart it due to a game (The Division) crashing in the load screen. After playing it for a few minutes, I closed it out and went to play a Games Pass game, only to get the dreaded "The person who bought this needs to sign in or go to the Microsoft Store". I even tried games I'd seen my kids play a few hours ago with no issue - now they won't launch and instead give this error. I also tried to simply do some Cloud Gaming - although I could launch the Game Pass game, it errors out when I try to launch via Cloud.

I confirmed that the Series X is NOT checked as the Home Xbox, and the Xbox One IS checked as the Home Xbox. No difference from where it was when we last solved this issue.

Any clue what is happening here, how to fix it, and avoid it from happening again? This is not only frustrating, it's a bit confusing that it seems to be randomly happening.