Hello @m_hassan
You using an obsolete copy of assignment hence encountering these issue. the code line raising the issue in your code snipped is not present in the updated assignment. So kindly get a fresh copy and then re-do the assignment.
In case you state that you have an update copy then either you have edited the grader cell as some of the arguments are deleted and code lines are added by you which I am not sure.
So it is better you grab a fresh copy of assignment and start from scratch.
to get a fresh copy, follow the steps in the below post link
Also please avoid posting codes on public post threads, it is against community guidelines. When a mentor asks you for your codes, then you can personal DM them, otherwise it is always a better practice to share a screenshot of your error, and/or your output with the expected output without sharing any graded codes to prevent action from community staff for your membership on discourse community.
Regards
DP