Problem with Blizz Windows 10 App

Hello Blizz Support

On some PCs with Windows 10 we have installed the Blizz App (from the Microsoft Store). As soon as you start the app and want to start a meeting, you get the message that there is no Internet connection even though the PC is connected to the network.

As soon as you uninstall the Windows 10 Store app and run the Windows download (according to the attachment), Blizz works fine.
Is there currently a problem with the Windows 10 Store app?

Thank you very much for your feedback.

Yours sincerely
nmoreira