Service fails to start if base connector cannot be found

Service cannot be started. Unify.Framework.UnifyServiceInitializeException: A connector matching the id 'bf96de17-ee6f-490a-b3c3-77a18435a734' could not be located. ---> Unify.Framework.UnifyEngineException: A connector matching the id 'bf96de17-ee6f-490a-b3c3-77a18435a734' could not be located.
at Unify.Product.IdentityBroker.ConnectorRepository.GetConnectorSchema(Guid connectorId)
at Unify.Product.IdentityBroker.EventNotifierConnectorRepositoryDecorator.GetConnectorSchema(Guid connectorId)
at Unify.Product.IdentityBroker.Adapter.RefreshColumnSources(IEntityChangeDetector entityChangeDetector, IEnumerable`1 existingChangeProcessorConnectorIds, Func`5 createColumnSourcesFunction, Action`3 addBaseConnectorChangeProcessorAction)
at Unify.Product.IdentityBroker.AdapterEngine.RefreshColumnSources(Guid adapterId)
at Unify.Product.IdentityBroker.AdapterEngine.<.ctor>b__2(IOperationalAdapterBase`2 adapter)
at Unify.Product.IdentityBroker.AdapterAdded`1.Invoke(TAdapterType adapter)
at Unify.Product.IdentityBroker...