[QUESTION][2nd Chapter] LinearRegression() - Value Error

Hi sir, I have recently started reading your book and I'm in 2nd chapter now. till transformation pipeline I have got good knowledge and have implemented each line of code and practiced it as well.

But, coming to "Training and Evaluating on the Training Set" part, when I tried using linear regression an error is showing up by stating that "**ValueError: Found input variables with inconsistent numbers of samples: [16512, 4128]**"

```python
from sklearn.linear_model import LinearRegression

lin_reg = LinearRegression()
lin_reg.fit(housing_prepared, housing_labels)
```

I'm not getting this issue
and I'm stuck here, hope to hear back from you soon sir, Thank you