Games Not Installing on Xbox App (PC) - Microsoft Community
https://answers.microsoft.com/en-us/xbox/forum/all/games-not-installing-on-xbox-app-pc/c6b7dcf7-416c-4024-a518-1505ada53f87
In the windows search bar type Powershell > Right click and select open as administrator > Type the command: "get-appxpackage Microsoft.GamingServices | remove-Appxpackage allusers" > Wait for the process to finish and then restart the PC, then open your Xbox gamepass app, it will ask you to install the gaming services again, install it and try again.
In the windows search bar type Powershell > Right click and select open as administrator > Type the command: "get-appxpackage Microsoft.GamingServices | remove-Appxpackage allusers" > Wait for the process to finish and then restart the PC, then open your Xbox gamepass app, it will ask you to install the gaming services again, install it and try again.
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