Update app/app_utils.py

app/app_utils.py

@@ -25,12 +25,12 @@ def preprocess_image_and_predict(inp):
     inp = np.array(inp)
 
     if inp is None:
-        return None, None
+        return None, None, None
 
     try:
         h, w = inp.shape[:2]
     except Exception:
-        return None, None
+        return None, None, None
 
     with mp_face_mesh.FaceMesh(
         max_num_faces=1,
@@ -60,7 +60,7 @@ def preprocess_image_and_predict(inp):
             return cur_face, heatmap, confidences
         
         else:
-            return None, None
+            return None, None, None
 
 def preprocess_video_and_predict(video):