C4 W3 Assignment 3 (U-net) not marked as complete

I have finished and submitted and passed the assignment, 5 times.
But still, it cannot be marked as complete!
Who can help?
I asked Coursera support 3 WEEKS ago, but the problem is still being not fixed!

Only Coursera can sort out this problem. You can try one more time in Coursera Help Center. Chat is the easiest way to quickly get help with learner questions and issues.

I had a similar problem a week ago. Pls, send screenshots of the situation to Coursera. They’d help out in few minutes.