Update app.py

app.py

@@ -142,6 +142,6 @@ latex_delimiters_set = [{
         "display": True
     }]
 
-
-demo = gr.ChatInterface(fn=ovis_chat, textbox=gr.MultimodalTextbox(),multimodal=True)
+hist= gr.Chatbot()
+demo = gr.ChatInterface(fn=ovis_chat, textbox=gr.MultimodalTextbox(),multimodal=True,additional_inputs=hist)
 demo.launch(debug=True)