I've deleted a Role associated with a Repository.  (The Role had upload roles set) upon deleting that role the module no longer displays anything and a message

"A critical error has occurred.  Object reference not set to an instance of an object. Has appeared."

Solution (Just replace 12 with whatever roleID is missing):

SET IDENTITY_INSERT ROLES ON;

INSERT INTO ROLES

(ROLEID,PORTALID,ROLENAME,TrialPeriod,TrialFrequency)VALUES

(12,0,'AnyRoleTitle',1, 'N');

SET IDENTITY_INSERT ROLES OFF;
SELECT * FROM ROLES;