Issue

Period update error - The EventDocument does not conform to the EventType's schema: The element 'DateRange' has invalid child element 'EndPeriodDate'. List of possible elements expected: 'StartPeriodDate'.

Resolution

An environment error is preventing the Period Update from running. Please try again after a few hours, if the error persists, please contact Class support. 

For further information on other period update errors, refer to Period Update Error Messages: Summary