fix

app/Models/InstanceSettings.php

@@ -42,7 +42,7 @@ class InstanceSettings extends Model implements SendsEmail
         ray($url);
         $port = $url->getPort();
         if ($port) {
-            return 6001;
+            return '6001';
         } else {
             return null;
         }

app/Providers/AppServiceProvider.php

@@ -30,6 +30,6 @@ class AppServiceProvider extends ServiceProvider
                 ])->baseUrl($api_url);
             }
         });
-        view()->share('realtimePort', \App\Models\InstanceSettings::realtimePort() );
+        Config::set('realtime.port', \App\Models\InstanceSettings::realtimePort());
     }
 }