Thanks bud.

I ran that already (forgot to mention). No port 3000 in use.

I also got a an "authtication failed" error in the log file. But it's not failing against my Nefit controller. I know that for sure.

For now gave up and restored an automatic img file of the day before to a different SD so ...

I've been at it all night without success,

I tried to follow these instructions.
https://eye-vision.homeip.net/domoticz-configureren/

I have a fully updated raspberry pi 4 running Ubitquiti contoller / Pi-Hole and Domoticz.

I manage to get the script to run and go online. But i think there the ...