Start of FS2020 not possible. Strange Image intervenes

Hello team,
I suddenly (since yesterday) can no longer start the flight simulator. An unfamiliar screen appears (see attachment) - Microsoft Flightsimulator is written at the top left and “Data is being synchronized” and then “Start” at the bottom right. However, nothing happens. The picture disappears without the FS2020 being started.

What have I done so far?

Uninstalled and reinstalled the XBOX app
Uninstalled and reinstalled Microsoft Flightsimulator

Unfortunately without success.

Regards
Bodo

I’ve never seen that image before. Doing an image search, and I can see a report of it when the PC Xbox app is failing to load, about 6 months ago. So new to us, but not to the Xbox app it seems.

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I don’t know if it helps any, but that looks like the cloud gaming logo

are you using a firewall or VPN ?? maybe take a look at the firewall rules ?