Update app.py

app.py

@@ -214,7 +214,8 @@ footer {
 """
 
 
-with gr.Blocks(theme="Nymbo/Nymbo_Theme", css=css) as demo:
+with gr.Blocks(theme=gr.themes.Dark(), css=css) as demo:
+
     with gr.Column(variant="panel"):
         with gr.Row():
             prompt_textbox = gr.Textbox(label="Prompt", lines=1)