C1_W2_Leainear_Regression exercise

In ML C1 W2 1St Programming assignment I keep getting below errors. Can you help me out!
Please note that I am not too familiar with Jupyter notebook.

Here’s Images of error

Hi @Hoang_Tr_n_Minh ,

It could be that your execution environment is out of steps, and the input parameters of compute_gradient() were not linked in. Refresh the kernel and clear all output, then rerun all the cell from start. You can put a print statement at the start of the function to check if the input parameters are what you expected them to be.