Observation: ERROR is a memory found in JasKra's chamber during Heart of Stone. It has no use in the quest. It may be combined with Observation: Theft to create Combined observation: Xenia is harming the mouthpiece or with Observation: Arrival to create Combined observation: Xenia is avoiding detection; however, these memories are useless.
As the vision swirls into focus, you find yourself watching nothing, as though something is interfering with the vision. You can't make out anything useful, which is disconcerting.