What means "Error: Clause should not be null!"?

[Patrick Scherler]

Everytime I update a story in the backlog I get an error saying "Clause should not be null!". What exactly is the clause of a story? I can't find such a field anywhere.

[Nic Brough -Adaptavist-]

Your admins have installed an add-on that adds something that is failing to read a database.  Ask them to remove it, as they have not configured it correctly