diff --git a/frontend/src/api/websocket/WebSocketManager.ts b/frontend/src/api/websocket/WebSocketManager.ts
index 91074016..06cf8c6e 100644
--- a/frontend/src/api/websocket/WebSocketManager.ts
+++ b/frontend/src/api/websocket/WebSocketManager.ts
@@ -214,9 +214,16 @@ class WebSocketManager extends EventEmitter {
   }
 
   private getWebSocketBaseUrl(): string {
-    const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
-    const host = process.env.REACT_APP_WS_URL || window.location.host;
-    return `${protocol}//${host}/ws`;
+    if (typeof window !== 'undefined') { // Check if window is defined
+      const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
+      const host = process.env.REACT_APP_WS_URL || window.location.host;
+      return `${protocol}//${host}/ws`;
+    } else {
+      // Provide a fallback for server-side or non-browser environments
+      // You might want to get this from environment variables or a config file
+      // depending on your setup.
+      return process.env.REACT_APP_WS_URL || 'ws://localhost:3000/ws'; 
+    }
   }
 
   // Get connection status