Meaning: Invalid class id for profile knuckle rule 'PRKProfileKnuckleInit'. Failed to retrieve the Profile Knuckle Rule because there was a failure in retrieving the ClassID or the ClassID was invalid for profile knuckle rule 'PRKProfileKnuckleInit'.
Recovery: Make corrections to the ProfileKnuckle rule and make sure it is properly registered with 'PRKProfileKnuckleInit'.