For the heck of it, I installed the Solitaire program. It runsfine. But, as you stated, it is not a Microsoft product. "MS, instead of "Microsoft". Not too good an idea of Microsoft to let than name slip in. This confirms Wynona's last post, where the difference was noted.
fwiw. I am (always) signed in with a Microsoft account. I honestly believe that anyone who uninstalls the preview, and attempts to re install it, will receive the same error.
Thank you for your information.