Update app.py

app.py

@@ -58,10 +58,10 @@ def predict(message, history, system_prompt, max_tokens, temperature, top_p):
         partial_text += new_text
         yield partial_text
 
-# Custom theme
+# Custom theme (Fixed for Gradio 4+)
 theme = gr.themes.Soft(
-    primary_hub_palette=gr.themes.colors.slate,
-    secondary_hub_palette=gr.themes.colors.blue,
+    primary_hue="slate",
+    secondary_hue="blue",
 ).set(
     body_background_fill="*neutral_50",
     block_background_fill="white",