Ephemeris DSL rules no longer work / how to troubleshoot?

[alfista2600 (Jason)]

Working from this thread now to troubleshoot:

Openhab 2.5 No enum constant java.time.DayOfWeek.SATURDAY,SUNDAY

I have the same error at system startup with OH3.0.1. Is using the ephemeris.cfg still mandatory? If so, what is the purpose of the configuration in the UI? And why isn’t the error more helpfulll? If there is a configuration error, i would have expected a proper hint instead of a stacktrace. If all that is not the case, then something else is broken and i might need help to get it fixed 2021-01-27 22:03:09.906 [ERROR] [org.openhab.core.ephemeris ] - bundle org.openhab.…