I found it. It's a stupid mistake by myself.
I setup a new installation of Domoticz and didn't add any hardware yet.
I added the temperaturesensor of the raspberry and it's working now.
Thanks for the help and pushing me in the good direction.
I don't know what I'm doing wrong. I have the premium version installed, but I can not get any connection to Domoticz. I have installed Domoticz 2.3530 on a Pi. I tried serveral server-settings (http/https with ports 8080,6144/443, with or without username and password) .
I don't know what I'm doing wrong. I have the premium version installed, but I can not get any connection to Domoticz. I have installed Domoticz 2.3530 on a Pi. I tried serveral server-settings (http/https with ports 8080,6144/443, with or without username and password) .