Update app.py

app.py

@@ -48,10 +48,10 @@ def clear_points(image):
     # we clean all
     return [
         image,   # first_frame_path
-        [],      # tracking_points
-        [],      # trackings_input_label
+        gr.State([]),      # tracking_points
+        gr.State([]),      # trackings_input_label
         image,   # points_map
-        None     # stored_inference_state
+        gr.State()     # stored_inference_state
     ]
 
 def preprocess_video_in(video_path):