Loading symbol does not dissapear upon entering the Python course

The loading symbol does not disappear when I select the python course. The page appears, but the wheel continues to scroll and scroll - It did this for around 1.5 hours today. The links used by codecademy should not be blocked in the firewall. Any suggestions are appreciated.

Have you tried reloading the page?

Use a different browser. Try firefox if not already.

yes. I have also tried Firefox, Chrome, Safari, Edge and IE. So far it will only work on one other computer.