update fix

Author: ChiragAgg5k

templates/web/src/client.ts.twig

@@ -478,7 +478,7 @@ class Client {
                 this.realtime.lastMessage = message;
                 switch (message.type) {
                     case 'connected':
-                        let session = this.config.session;
+                        let session = this.config?.session;
                         if (!session) {
                             const cookie = JSON.parse(window.localStorage.getItem('cookieFallback') ?? '{}');
                             session = cookie?.[`a_session_${this.config.project}`];