Wall Mount device regular shows "unable to connect to Home Assistant"

Hi,
since a few weeks my wall mount Nexus 9 shoiws me the error “unable to connect to Home Assistant” (see similar picture below). It was running without porblems for a few months before. Does anyone have an idea how to solve the issue?

I’,m running HASS.IO with Operating System 3.10 and Home Assistant Core 0.105.2

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Did you try the latest version 1.7.1?

I’m embarrassed but I think I solved the issue last evening with deactivation of W-LAN ECO-Mode. It seems to me that the internet connection was just shut of in the middle of the night :crazy_face: