I've tried loading the canvas page on every browser on my computer including lockdown and it will not load. It just says server error and no matter what I do it won't work. Every other website I try to load works perfectly fine.
I took a look at the Canvas status page and don't see any reported issues from today. Some schools use an external authentication system which actually lives outside of Canvas. If your school does it's possible that it's just the authentication page that is down and not Canvas itself. Does your school have a help desk you can contact about this? That is the first place I would check to see if they can help you track down where the actual problem might be occurring.
Retrieving data ...