Fix a minor bug

src/app/user.service.ts

@@ -335,7 +335,7 @@ export class UserService {
     return this.subscribeDeployments().pipe(
       map((deployments: Deployment[]) => {
           return deployments.find(
-            (dep: Deployment) => dep.vo.id == vo.id
+            (dep: Deployment) => dep.vo ? dep.vo.id == vo.id : false
           );
         }
       ),