Submit and Go to next challenge NOT working

I was trying to submit after working on a challenge. It showed “Test success” and unable to Submit and Go to next challenge. It shows the

The server could not be reached and your progress may not be saved. Please contact contact if this message persists

This problem persist last three days. Any help will be appreciated.

Which challenge are you talking about?

# (New) Responsive Web Design

Did you try sending an email to explaining the problem you are experiencing? If not, you should try that first as we are unable to help fix these types of problems on the forum.

Thank you very much for the information. I’ll do that

When you encounter persistent issues connecting to the server, it’s always worth logging out, clearing your browser’s storage, and logging in again. If you try that remember to copy anything out of the browser that you want to keep.