[rules-users] Drools-PermissionDeniedException

Hi All , Does any one have idea on this below error ? org.drools.task.service.PermissionDeniedException: User '[User:'XYZ']' was unable to execution operation 'Complete' on task id 3394226 due to no 'current status' matchines we are facing this un-known exception and it is impacting our work very badly :( . Please give me some idea to resolve this error . ---Regards,Sravan.