I get the error:
"There was an error grading one or more parts of your submission. Please review the messages below for suggestions.
We encountered the following warnings when grading this part:
We’re experiencing some technical difficulties. Please try submitting again. If the problem persists, please reach out to Coursera through our Help Center."
There is no “Exercise 7” in this assignment. It has only 5 exercises. Does anybody know what the problem is and how to solve it?