Update app_template.py

app_template.py

@@ -76,8 +76,7 @@ Welcome to **{TITLE}**! Say something like:
 chatbot_preview = gr.Chatbot(layout="panel", value=[(None, welcome_preview_message)])
 textbox_preview = gr.Textbox(scale=7, container=False, value=EXAMPLE_INPUT)
 
-# Modify this part to include your theme and CSS
-with gr.Blocks(css=css, theme=theme) as demo:
+with gr.Blocks(css=css, theme="ParityError/Interstellar") as demo:
     demo.add_component(chatbot_preview)
     demo.add_component(textbox_preview)
     demo.add_component(gr.Button("Submit"))