Why can't I use the absolute path?

[waitingfor-you]

Traceback (most recent call last):
File "C:\Users\Acer\Desktop\ちよこ\src\recognition_camera.py", line 106, in
predict_expression()
File "C:\Users\Acer\Desktop\ちよこ\src\recognition_camera.py", line 80, in predict_expression
faces = blaze_detect(frame)
File "C:\Users\Acer\Desktop\ちよこ\src\blazeface_init_.py", line 26, in blaze_detect
faceDetector = blazeFaceDetector(modelType, scoreThreshold, iouThreshold)
File "C:\Users\Acer\Desktop\ちよこ\src\blazeface\blazeFaceDetector.py", line 25, in init
self.initializeModel(type)
File "C:\Users\Acer\Desktop\ちよこ\src\blazeface\blazeFaceDetector.py", line 34, in initializeModel
self.interpreter = tf.lite.Interpreter(model_path=r'C:\Users\Acer\Desktop\ちよこ\src\blazeface\weights\face_detection_back.tflite')
File "C:\Users\Acer.conda\envs\FER\lib\site-packages\tensorflow\lite\python\interpreter.py", line 198, in init
model_path, self._custom_op_registerers))
ValueError: Could not open 'C:\Users\Acer\Desktop\ちよこ\src\blazeface\weights\face_detection_back.tflite'.
[ WARN:1] terminating async callback