Hi @Matt Wellman
Please try clearing your browsing history and cache + cookies before logging on to your account and accessing the course. If that doesn't work, you may want to try using a different browser. Our recommend browsers are Google Chrome, Mozilla Firefox, and Internet Explorer. If you are working on an office computer, please check if you have access restrictions or if you have a firewall setup in your office network.
what does that mean clean your browsing history
Clearing the browsing history just means emptying it, so that the next time you display a web page everything must be downloaded anew.