Chapter 3 i get this error

I get error when i run the fit in the grid_search, why is this?

```python
from sklearn.model_selection import GridSearchCV

param_grid = [
{"weights": ["uniform"], "n_neighbors" : [3, 5, 10, 20]},
{"weights": ["distance"], "n_neighbors": [3, 5, 10, 20]},
]

grid_search = GridSearchCV(knn_clf, param_grid, cv = 3, scoring = "f1_macro")

grid_search.fit(X_train_scaled, y_train)
```