Update app.py

app.py

@@ -20,7 +20,7 @@ set_window_url_params = """
     function(text_input, url_params) {
             const state = {text_input:text_input}
     	    const queryString = '?' + new URLSearchParams(state).toString();
-            window.postMessage({ queryString: queryString }, "*")
+            window.parent.postMessage({ queryString: queryString }, "*")
             return [text_input, state];
         }
     """