P3.1: Device not connected to MyGHL

My internet provider was messing around last weekend and after long discussion they came to renew the router in the house.
To that router I have connected my wifi and also my GHL products (Profilux and Doser 2).
Each of them has an assigned ip address.
Profilux:192.168.1.120
Doser 2:192.168.1.121

When trying to registering both to MyGHL i get a message for the profilux that it is not connected to MyGHL.
My Doser 2 could be connected without any problem.
I can open the webserver for Profilux and see the ip address in my connection list.

Still, the message returns every time when I verify the ID.

I am using the manual attached for this, but will need some extra support.
Attachment 8508

Hello,

you mentioned the PL3-Webserver. This is in your local network.

Did you check the networking addresses, especially Gateway-IP and DNS-Server-IPs?

Send me myGHL-ID and serialnumber of your devices, so I can check their online state.

Thank you Matthias.
Because of your comment I check all again and found one mistake in the set up.
All online now.