How to set Up Katalon in a DevOps environment

How can i set up Katalon in a DevOps environment. My Company would like to know if Katalon meets our requirements so we would test it. We use a k8s Cluster in wich we running gitlab and the corresponding runners. Please can you provide me a step by step tutorial or description? Do we need a license to test Katalon? I have tried to set up Katalon according this link Continuous Integration with GitLab | Katalon Docs but we ended up with this error

Thanks in advance!