Using Plugins with Katalon Studio Enterprise License

Hello, I’m having a very similar issue to this:

Can’t run testcase with custom keywords on console mode. Please help - Katalon Studio / Web Testing - Katalon Community

The problem is that I’m not missing my API key.

I am running the tests in Jenkins. I was able to get my custom jar file into the “Plugins” folder on the Jenkins computer, but the functions in the jar file are having an “unable to resolve class” error when I try to run my tests.