API test against web service running in AKS fails with 'Connection refused' and lots of 'Could not resolve module' errors in the Katalon log when executed from Github Actions workflow

!SESSION 2022-03-23 13:28:20.132 -----------------------------------------------
eclipse.buildId=unknown
java.version=11.0.14.1
java.vendor=Eclipse Adoptium

You should use Java8 to run Katalon Runtime Engine.

Unable to init server: Could not connect: Connection refused
Katalonc: Cannot open display:

The error shows that the machine is missing Xvfb that requires to run KRE on Linux.
You can try with windows-latest machine. Please refer to this example: