Course 4, Week 3, Part 2: You are requesting a page that does not exist!

Course Q&A Deep Learning Specialization Convolutional Neural Networks
1

I was toward the end of the problem for Course 4, Week 3, Part 2 " Image Segmentation with U-Net", when my browser suddenly shows the following error message:

# 404 : Not Found
You are requesting a page that does not exist!

Can someone help, please! I do not have any option for reset…

2

I just looked at the C4 W3 A2 notebook, and didn’t see any problems.

3

Managed to reset using help menu (though lost all my work) …Thanks