Update app.py

app.py

@@ -145,7 +145,7 @@ with gr.Blocks() as demo:
         query = gr.Textbox(label="Enter your query")
         query_button = gr.Button("Search")
         query_output = gr.Textbox()
-        state = gr.State()
+        state = gr.State([])
         query_button.click(fn=process_and_query, inputs=[state, query], outputs=query_output)
 
 demo.launch()