Bug fix in load_data

app.py

@@ -125,6 +125,10 @@ def load_data(request: gr.Request, model_3d, image_slider):
     model_url = query_params.get("3d", None)
     hm_url = query_params.get("hm", None)
     img_url = query_params.get("image", None)
+
+    if model_url is None and hm_url is None and img_url is None:
+        # No URLs provided, return default values.
+        query_params = {}
     
     # Process the model URL if provided.
     if model_url: