I have some of this in my log:
[ore.internal.items.ItemUpdater] - InstantiationException on org.openhab.core.library.types.StringType
Whitch module do i add or change in logback.xml to debug this.
/Mike
The easiest way to debug is starting openhab with start_debug.sh instead of start.sh.
In this case the logback_debug.xml is used and sets all logs to debug mode.