W3-Trigger Word Detection-Score0/100-error in grading?

I get the error:
"There was an error grading one or more parts of your submission. Please review the messages below for suggestions.
Exercise 7

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?

Thanks

Sounds like Coursera was having some problem with their notebook platform.

It’s only this assignment, I’ve done some of the other assignments of the Deep Learning Specialization and there was no problem in grading.

I think “Exercise 7” refers to this being the seventh assignment in Course 5. Three in Week 1, two in Week 2, and two in Week 3.

I just tested the grader by submitting my programming assigment. 100/100, no error messages.