Prediction for new sample

Hi, pardon, I have trained a ngboost model, for the new sample below:

X_test1=np.array([[2, 19, 40, 30, 1 ]])

how to get the prediction?  As the code below can not be run and is error.

Y_pred = ngb_.predict(X_test1)
Y_dist = ngb_.pred_dist(X_test1)

Looking forward to receiving your message. 

Many Thanks!