fix: define the function before loading the model

app.py

@@ -9,8 +9,6 @@ from fastai.vision.all import load_learner, PILImage, PILMask
 
 MODEL_PATH = Path('.') / 'models'
 TEST_IMAGES_PATH = Path('.') / 'test'
-LEARNER = load_learner(MODEL_PATH / 'car-segmentation_v1.pkl')
-
 
 def preprocess_mask(file_name):
     """Ensures masks are in grayscale format and removes transparency."""
@@ -38,6 +36,8 @@ def preprocess_mask(file_name):
     # Convert to grayscale after handling transparency
     return PILMask.create(mask.convert('L'))
 
+LEARNER = load_learner(MODEL_PATH / 'car-segmentation_v1.pkl')
+
 
 def segment_image(image):
     image = PILImage.create(image)