Update_parameters_with_adam strange error

HiHi,
I have been getting the error operands could not be broadcast together with shapes (2,3) (3,3)
I just can’t figure out why this is happening. The code is just like the equation!

[Image removed for honor code]

Hi @Svenzo,

Looks like you have 1’s where it should be l’s.

I’m going to remove the image from your post since contains part of the solution.