Deleting a group in grouper thats been imported in midPoint gives error in task execution

If we delete a group in grouper that has been imported in midPoint then Grouper reconciliation task gives the following error:

 

Internal Error: Generic error in the connector ConnectorInstanceIcfImpl(connector:xxxxxxxx-...(ConnId com.evolveum.polygon.connector.grouper.rest.GrouperConnector v0.6)). Reason: org.identityconnectors.framework.common.exceptions.ConnectorException(Get group by UUID (with members) failed: problem occurred during executing URI: https://xxx.harvard.edu/grouper-ws/servicesRest/json/v2_4_000/groups??HTTP error 500 500 : {"WsGetMembersResults":{"resultMetadata":

{"success":"F","resultCode":"PROBLEM_GETTING_MEMBERS","resultMessage":"There were 0 successes and 1 failures of getting members for groups."}

,"subjectAttributeNames":["name","description"],"responseMetadata":{"serverVersion":"2.5.35","millis":"3"},"results":[{"resultMetadata":{"success":"F","resultCode":"GROUP_NOT_FOUND"