diff --git a/openvidu-testapp/src/app/app.component.ts b/openvidu-testapp/src/app/app.component.ts
index a57bf78d..38c3f41e 100644
--- a/openvidu-testapp/src/app/app.component.ts
+++ b/openvidu-testapp/src/app/app.component.ts
@@ -9,7 +9,7 @@ import { OpenviduParamsService } from './services/openvidu-params.service';
 })
 export class AppComponent {
 
-  openviduURL = 'https://localhost:4443/';
+  openviduURL = 'https://' + window.location.hostname + ':4443/';
   openviduSecret = 'MY_SECRET';
 
   constructor(private router: Router, private openviduParamsService: OpenviduParamsService) { }
diff --git a/openvidu-testapp/src/app/components/openvidu-instance/openvidu-instance.component.ts b/openvidu-testapp/src/app/components/openvidu-instance/openvidu-instance.component.ts
index 42c584c1..fa8dad22 100644
--- a/openvidu-testapp/src/app/components/openvidu-instance/openvidu-instance.component.ts
+++ b/openvidu-testapp/src/app/components/openvidu-instance/openvidu-instance.component.ts
@@ -229,6 +229,7 @@ export class OpenviduInstanceComponent implements OnInit, OnChanges, OnDestroy {
       })
       .catch(error => {
         console.log('There was an error connecting to the session:', error.code, error.message);
+        alert('Error connecting to the session: ' + error.message);
       });
   }
 
diff --git a/openvidu-testapp/src/app/services/openvidu-params.service.ts b/openvidu-testapp/src/app/services/openvidu-params.service.ts
index bd4be953..84582c50 100644
--- a/openvidu-testapp/src/app/services/openvidu-params.service.ts
+++ b/openvidu-testapp/src/app/services/openvidu-params.service.ts
@@ -10,10 +10,10 @@ export interface OpenviduParams {
 export class OpenviduParamsService {
 
   params: OpenviduParams =
-  {
-    openviduUrl: 'https://localhost:4443/',
-    openviduSecret: 'MY_SECRET'
-  };
+    {
+      openviduUrl: 'https://' + window.location.hostname + ':4443/',
+      openviduSecret: 'MY_SECRET'
+    };
 
   newParams$ = new Subject<OpenviduParams>();