Convolutional Model Application/ "NameError: name 'convolutional_model'

I’ve problem with week 1’s second assignment on the exercise 2 section.

I got “NameError: name ‘convolutional_model’ is not defined” error.

Also sharing the link below.

Did you accidentally modify the function definition in the convolutional_model cell?

Try restarting the kernel and re-running all of the cells in the notebook.