Update app.py

app.py

@@ -99,7 +99,7 @@ with st.container():
     txt = gr.Textbox(label="Enter your query", placeholder="Ask a question...")     
     submit_btn = gr.Button('Submit')
 
-    @submit_btn.capture()
+    @submit_btn.click()
     def on_submit():
       add_text(chatbot, txt)
       generate_response(chatbot, txt, pdf_upload1)
@@ -111,7 +111,8 @@ if __name__ == "__main__":
     [pdf_upload1, chatbot, txt, pdf_upload2, pdf_upload3],        
     [show_img, chatbot, txt],   
     title="PDF-Powered Chatbot"     
-  ).launch()  
+  ).launch() 
+