Update app.py

app.py

@@ -354,7 +354,7 @@ def build_interface():
 
                 def on_sub_cat_select(top_c, sub_c):
                     species = get_species_list(FURRY_DATA, top_c, sub_c)
-                    return gr.update(choices=sp, value=None)
+                    return gr.update(choices=species, value=None)
 
                 sub_cat_dd.change(
                     fn=on_sub_cat_select,