Games not launching with Game Pass Ultimate on PC

Hi,

I can not get games to launch with Game Pass Ultimate on PC.

I have tried several things and nothing has sorted this.

Obviously, I have paid for this subscription and it is very annoying that I am unable to play anything. It used to be OK but I am constantly now getting This App Can't Open Check Windows Store For More Info On ....... after it has started to load but then stops. And every time after the first time it comes straight up with the error message without even trying to start the game.

When I go to the game on windows store via the link I get the play button again but get the same error again.

I have tried reinstalling everything from individual games to formatting the drive and reinstalling every game and also the Xbox app and game services and still having the same issue.

I have tried disabling the game bar and making sure I am logged in to both Xbox app and store under the same account and also making sure my region, date, and time are all correct, and still nothing.

There are many games I would love to play on Game Pass which is why I pay for the Ultimate subscription but with no service at all what is the point. I have just wasted my money.

Please can you advise me what to do next to sort this issue?

Thanks,

Simon

:)