"The Ninth Wave" practice of C++ intermediate course does not appear

Question

Hi there! Actually all I want is to report a bug about the lesson Constructors of C++ intermediate course. "The Ninth Wave" practive does not appear. Actually the message that pops up is the following:

Oops, Error!
Sorry! It seems something went wrong on our end!

Can you fix it?
Thank you very much.

Answer 1

It appears this error occur in web browser, but it works inside the app.
You can report this bug to [e-mail], or click "Contact" at the bottom of the page.