Course 4 week 1 assignment 1 - Exercise 5 : conv_backward()-Wrong values for dA

I have fixed the error.
image
Please help me! I’ve almost done the math, but there’s still a slight error in the results. I’ve rewatched it many times but still don’t know what the cause is.

I have fixed the error.
A_prev,W,b instead of using the np.random.randn() command I used the np.zeros() command