Using a time capsule for time machine for time machine backups for a Mac mini and a MacBook air, the air connects by WiFi and the mini via an ethernet cable.

When I try to open the airport utility app on my air, it says the capsule was part of my network but now cannot be found (even though time machine backs up to it). If I go into Finder and click on network the capsule is visible.

Why can't the airport app see the capsule?

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