C4:W4:Lab2 - Neural Style Transfer - kernel is dead

The kernel is dying continuously for past few hours. Please help.
I tried running previous lab work and it worked fine, seems like something is wrong with this kernel.
Thank You.

Oh! This happens with this assignment sometimes. Try running it at different times. Meanwhile, you can submit your assignment if you completed all your code as grader do not need to see the output of your code.

okay, thank you sir, I will try later as I have to complete the final total loss function.