Hi there!
Please use the Bugs & Issues category here: #bugs-and-issues
After going to that section, click on the search icon and the search will be restricted to that section.
Do a search for “gaming services”.
Gaming Services Search:
Search results for ‘gaming services category:200’ - Microsoft Flight Simulator Forums
There is also a topic where MSFS launches the MS Store for Gaming Services install:
The error code of “0X8007139F” has not been reported on this forum. If none of the above “gaming services” topics work for you, then create a new one in #bugs-and-issues:performance with that error code.
The error code: 0X8007139F is related to Windows 10 Update failure of apps.