Support for Multical-21 integration using ESP32 and CC1101

Hi All,
I have build a solution following this git-repos: Watermeter-using-ESP32.
I have the kem-file, password, have decrypted it and solution seems to be running kinda.
In MQTT: i receive 2 messages:
watermeter/0/online = False
watermeter/0/ipaddr: 192.168.1.xxx

Ip is correct and match what my DHCP-router have handed to the ESP32.
But i am clueless to why the watermeter/0/online=false.
It is my first solution using MQTT, so have no experience in this, neither do i know if this is issue or if it is my hardware. But since it is getting correct IP, and it can communicate the issue to MQTT, i sense it is not these parts which make is false,

Does anyone have a clue to where to look or what the issue may be?
I can’t figure out if it is my MQTT setup or something else (likely obvious)?

I hope for some kinda guidance as i am pretty stock and have the sense that solution is just around the corner.
Br. Lasse