Getting this error when Installing event policy?

Installing policy for job [All online jobs]
ERROR: Failed to resolve service name – dns
Error processing Ignore rule (problematic field – ‘service’)
Failed to build correlation policy for event ‘Abnormal activity on service’

Goto

Policy -> Event Policy -> Anomalies -> Abnormal activity on service

Validate all predefined entries are in fact valid.

We had a cause where the third entry was defined as

Replacing this with fixed our issues.