Well. I performed another reset and this worked as well. Me not having Sunny explorer installed (I’m a Linux Mint guy, for a year now) tried another way. Disconnect the DC side (solar panels) of the inverter, disconnect the AC side (by disabeling the fuse). Then wait a little while and reconnect all, and SMA Energy app is working fine again!
Yeah, that’s what I do in “lazy mode”. It reboots the inverter and solves it as well.
But this should best be done while dark: disconnecting DC power from active solar panels can cause huge electric arcs, which can damage or even destroy your DC switch. Not to mention risking fire.
Me too, for 20y already I guess 
On linux you’d be able to browse to
as well. I do this on my Android phone.
