Update app.py

Trying to figure out WTF gradio keeps breaking for

app.py

@@ -102,14 +102,13 @@ def convert_model(model_to_load, save_precision_as, epoch, global_step, referenc
 # ---------------------- GRADIO INTERFACE ----------------------
 def build_theme(theme_name, font):
     """Create accessible theme with dynamic settings."""
-    base = gr.themes.Base()
+    base = gr.themes.Default()
     return base.set(
         primary_hue="violet" if "dark" in theme_name else "indigo",
-        font=(font, "ui-sans-serif", "sans-serif"),
-    ).set(
-        button_primary_background_fill="*primary_300",
-        button_primary_text_color="white",
-        body_background_fill="*neutral_50" if "light" in theme_name else "*neutral_950"
+        font=[font, "ui-sans-serif", "sans-serif"],
+        button_primary_background="*primary_300",
+        button_primary_text="white",
+        background_fill="*neutral_50" if "light" in theme_name else "*neutral_950"
     )
 
 with gr.Blocks(