Hi, I am currently trying to use an Object containing Jodatime as a parameter. unfortunately I then get the error:

java.lang.IllegalAccessException: class kotlin.reflect.jvm.internal.calls.CallerImpl$FieldGetter cannot access a member of class org.joda.time.LocalDate with modifiers "private final"
kotlin.reflect.full.IllegalCallableAccessException: java.lang.IllegalAccessException: class kotlin.reflect.jvm.internal.calls.CallerImpl$FieldGetter cannot access a member of class org.joda.time.LocalDate with modifiers "private final"
	at kotlin.reflect.jvm.internal.KCallableImpl.call

Any idea what I can do? Can I use my own serializer, eg. objectMapper?