Improve error handling on channel component

frontend/src/app/lightning/channel/channel.component.ts

@@ -38,7 +38,9 @@ export class ChannelComponent implements OnInit {
               }),
               catchError((err) => {
                 this.error = err;
-                return of(null);
+                return [{
+                  short_id: params.get('short_id')
+                }];
               })
             );
         }),