[SOLVED] Habmin log error navigating through Things

I get this error in tail log, and it seems like it´s happening everytime I´m navigating through Things in Habmin.

I have no idea why. And I can´t really see any symptoms either, except for the log ofcouse.

2018-06-28 23:40:13.078 [ERROR] [e.internal.WriterInterceptorExecutor] - MessageBodyWriter not found for media type=text/plain, type=class java.util.Collections$UnmodifiableCollection, genericType=class java.util.Collections$UnmodifiableCollection.

It looks like it is caused through HABmin but it is not:

Ahh sorry. I didn´t see the original thread:

Guess this thread should be closed then… Thanks for letting me know.