User with delegated_developer role sees blank screen on login or impersonation.DescriptionUser with delegated_developer role for custom company application sees a blank screen on login or impersonation.CauseThe role field is empty for records in table sys_scope_permission_set_role_assignment for the particular custom application.ResolutionLogin as Admin. 1>Make a back up of the records having the role field empty for table sys_scope_permission_set_role_assignment by exporting XML. 2> Delete the records from step 1> 3> Create a User delegated developer role. See the documentation Delegate development and deployment permissions to personnel