Error on project build a 25 + 5 clock

I can’t access the link to a functionally similar app
it is giving me this error:

We are upgrading this part of for the next few minutes.

While you wait try one of our free courses on Python, SQL, JavaScript and Linux.

You should follow us on twitter for updates. We thank you for your patience while we make faster.

it’s been days and the error is still there

I opened an issue for it.