App installed but won't open

[S Doran]

I'm getting the message that "we couldn't verify and install this app because it is not available in the Microsoft store" - even though I have set "choose where to get apps" to "anywhere". The app is a Windows 10 printer app and I want to see if it will run on Windows 11. It goes through the installation wizard without a problem and appears on the list of installed apps, but then I get that message when I try to open it. Sure, there may be a compatibility issue, but why am I getting the Microsoft store message and can I disable that?

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