No, it’s impossible until somebody answers this: Running `org.openhab.demo.app` with `org.openhab.automation.jsscripting` enabled
But, I have Groovy and Jython installed with no errors that I’ve found, although I haven’t tested making rules with them because I’ve yet to find example rules for them.
The error messages seems to stem from JRuby itself, and I’d think that if I remove the helper library there would be no error (the rules obviously wouldn’t work either, because they need the helper library).