Hey @JulieHitche380, I'd recommend responding to that email and telling them that you got a 404 error. Our support team is the best equipped to help you out with something like this.
Please also keep in mind that the instructor community is not an escalation channel. There are a lot of things we're happy to discuss and share information about, but the ins-and-outs of how to use the platform are best answered by our support team. Thanks!