Update app.py

app.py

@@ -66,12 +66,15 @@ with gr.Blocks(css=css) as demo:
                 load_pdf = gr.Button("Load pdf to langchain")
         
         chatbot = gr.Chatbot([], elem_id="chatbot").style(height=350)
-        with gr.Row():
-            question = gr.Textbox(label="Question", placeholder="Type your question and hit Enter ")
+        question = gr.Textbox(label="Question", placeholder="Type your question and hit Enter ")
+        submit_btn = gr.Button("Send message")
     load_pdf.click(loading_pdf, None, langchain_status, queue=False)    
     load_pdf.click(pdf_changes, pdf_doc, langchain_status, queue=False)
     question.submit(add_text, [chatbot, question], [chatbot, question]).then(
         bot, chatbot, chatbot
     )
+    submit_btn.click(add_text, [chatbot, question], [chatbot, question]).then(
+        bot, chatbot, chatbot
+    )
 
 demo.launch()