Automatic Grading is not working on my part

I tried to submit my last assignment of week 4 in Linear Algebra for Machine Learning and Data Science for like a billion tiimes and ths is the last assignment and after that I should get my certificate. Everything on my part is correct inclusing the code but still it is not grading my assignemnt. What should I do? I have even opened a ticket on coursera but no value!!
I have also attached the assignment as a reference if someone could check that please

Most likely there is something in your notebook that is making the grader crash. When this happens, it can throw error messages that don’t make a lot of sense.

There are about a half-zillion things that can make the grader crash.

In the future, please don’t post your code on the forum> That’s not allowed by the Code of Conduct. If a mentor needs to see your code, we’ll contact you privately with instructions.

I’ll provide a few hints shortly.

I will be waiting Sir

After a quick review, I wasn’t able to find any definite cause.
I’ll continue looking.

I did find that your copy of the notebook is out of date by one revision. But that change (from two months ago) was only to fix a typo in a comment, and does not impact the executable code or the grader. So that’s probably not what is causing this issue.

I am curious how you got a copy of the notebook that is at least two months old.

I do get help from the internet when I am stuck. I got some help from one of my good friend from stack overflow

If that help included your friend sending you his notebook file, that is not allowed by the Code of Conduct.

I recommend that you delete your current notebook, and start over using the current notebook version. Avoid adding code from any other source into your notebook.

If you need help getting a fresh copy of the notebook, use the Search tool for “M4ML Resources FAQ”, and you will find the link. Instructions are there.

I will do that and if there’s any problem. I will let you know, sir