Error in grading practice exercises 2 week 2 - Course 1

I got an error like this and don’t know how to solve it. Please help me.

I have edited my code. And now I have another problem. In addition, I changed the parameter of optimize() to the same as model() parameters of X_train, Y_train,

2000 and 0.5 but still got this error.

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I fixed the error and got 100/100 already. Thanks

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Congratulations for finding the problems under your own power! Nice work! Onward! :nerd_face: