Hi

When running the Alpaca model, I get the following error.

```
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-35-11ffc7a7acb3> in <module>
----> 1 model2 = alpaca_model(IMG_SIZE, data_augmentation)
<ipython-input-34-b7e1c5914eb8> in alpaca_model(image_shape, data_augmentation)
30
31 # data preprocessing using the same weights the model was trained on
---> 32 x = preprocess_input(x)
33
34 # set training to False to avoid keeping track of statistics in the batch norm layer
/opt/conda/lib/python3.7/site-packages/tensorflow/python/keras/applications/mobilenet_v2.py in preprocess_input(x, data_format)
500 @keras_export('keras.applications.mobilenet_v2.preprocess_input')
501 def preprocess_input(x, data_format=None):
--> 502 return imagenet_utils.preprocess_input(x, data_format=data_format, mode='tf')
503
504
/opt/conda/lib/python3.7/site-packages/tensorflow/python/keras/applications/imagenet_utils.py in preprocess_input(x, data_format, mode)
117 else:
118 return _preprocess_symbolic_input(
--> 119 x, data_format=data_format, mode=mode)
120
121
/opt/conda/lib/python3.7/site-packages/tensorflow/python/keras/applications/imagenet_utils.py in _preprocess_symbolic_input(x, data_format, mode)
261 """
262 if mode == 'tf':
--> 263 x /= 127.5
264 x -= 1.
265 return x
TypeError: unsupported operand type(s) for /=: 'Sequential' and 'float'
```

I don’t know what I am doing wrong. Can someone help me, please?

Thank you!