[ADF-4205] Fix console error when adding user or group in Permissions Page (#4440)

demo-shell/src/app/components/permissions/demo-permissions.component.ts

@@ -63,17 +63,14 @@ export class DemoPermissionComponent implements OnInit {
     }
 
     openAddPermissionDialog(event: Event) {
-        this.nodePermissionDialogService.updateNodePermissionByDialog(this.nodeId).subscribe(() => {
+        this.nodePermissionDialogService.updateNodePermissionByDialog(this.nodeId).subscribe(
-            this.displayPermissionComponent.reload();
+            () =>  this.displayPermissionComponent.reload(),
-        },
+            (error) => this.showErrorMessage(error));
-            (error) => {
-                this.showErrorMessage(error);
-            });
     }
 
     showErrorMessage(error) {
         this.notificationService.openSnackMessage(
-            error,
+            error.message,
             4000
         );
     }