Integrate Cloud ALM with test automation tool in S4HC

Hi Experts,

I try to connect Cloud ALM with test automation in the Q-System, following this guide, and it fails.

Integrating the Test Automation Tool for SAP S/4HANA Cloud - SAP Help Portal

In the process I have to create a comms scenario 0620 which has one inbound http service only, and when I try this URL in the browser, it also fails (http 500).

Has someone managed to get test automation data into CALM?

thank you,

Johannes