TTN Gateway stops working


I’m using the kickstarter gateway but every time I connect it to the network (and 4 leds on the gateway) it will drop from the network after a few moments/hours/days and show two leds, with the second one flashing.

Installation was without problems, latest software installed, WiFi/Ethernet connection make no difference.

What could be the case?

I have another device Multitech Conduit and it never drops out. Works 24/7.