@SparkyD Hello, I don't have the issue anymore. After trying the suggestions I didn't change anything. It somehow worked itself out. The devices' LEDs are green and the app says it's connected....

@Kevin_Z Hello, If I change the DNS only on my ISP's modem it doesn't work. Changing the DNS on the modem of my ISP and my own router (Archer C7) fixed the problem for a brief moment. In the app it...

@Kevin_Z Hello, Yes, 2 Deco's are connected by cable, 1 on the topmost floor is not. They are set to access point mode. I have tried rebooting the Deco and the C7 several times, but it doesn't work....

Hello, I have a weird issue with my Deco M5's. There are 3 Deco's connected to my router (TP-Link Archer C7) where I manage port forwarding, address reservation, ... . The router in turn is connected...