Recently we had an issue where every time we would open up the Schedule Board an error message would appear:
Exception has been thrown by the target of an invocation.( – Priorities)
We realised that there was a Priority with no name. This is strange as the name field is a mandatory field. We added some text to the empty name field and everything was working again.
This error appeared in the FieldOne Sky module. Its possible that this could happen on Field Service as well.