@Vanellus it's fixed. I reset both Decos and installed the network from new. It only took five minutes.

@Vanellus This is the error I get when I open the Deco app

@Vanellus I have sent you a pm regarding the Deco account The system connects to the internet fine, performance is excellent. I use 2 Deco S4s in a mesh network connected to an ISP (Virgin Media)...

My S4 system works wonderfully well in my house. For personal reasons I had to shut down the system a week ago, but when I've restarted the system, the Deco app occasionally cannot connect to the S4...