Update app.py

app.py

@@ -17,7 +17,7 @@ try:
       return reply
 except:
   print("Try Again")
-custom_theme = gr.themes(primary_hue="blue", secondary_hue="green", neutral_hue="gray")  
+custom_theme = gr.themes.Default(primary_hue="blue", secondary_hue="green", neutral_hue="gray")   
 reply = gr.Interface(
     fn=ChatReply,
     inputs=gr.Textbox(label="Write any term", placeholder="E.g. Flutter?"),