There is sth wrong with kernel of assignment 2 of week 2

kernel couldn’t reconnect and if I submit my assignment give me 0
it happened to one of my friends too

Restart the kernel and clear all cell outputs.
Run all the cells again.

Hi and thanks for answer
But i did it about 15 times and i’m telling you there is sth wrong
My friend had exactly this problem and took her too long to get the result and she almost got mad at this course even wanted to unenroll
thank goodness we settled it out but I just want to report that problem