Can't Connect Locally

I'm currently unable to connect to my Inverter using the GivEnergy app (it scans but finds nothing).
The GivEnergy cloud (standard tier) is showing the Inverter last online 2 hours ago.
The inverter (HY3.6) is showing a slow flashing green - which is apparently normal for it being nighttime?
Could this be a WiFi dongle failure?

It's back able to be connected to again. For at least an hour, it wasn't available. Weird.

How weird! One of my AIO's went offline about the same time yours reconnected. Head scratching time now as AIO has a steady green light.

I'll check it again tonight,