Unfortunately errors happen and university sites are not immune. This particular error has been popping up recently and causing chaos within browsers. It stems from too much information being passed by the browser to the server and thus having it get slightly confused. To fix this error you need to clear your browsers cache or as a temporary fix, visit the site in an Incognito or Private browser window.

This error can also manifest itself without an error code and just say Request Header Fields Too Large. Each browser can have their own slightly different way of letting you know an error has occurred. The solutions provided below should solve the majority of these issues.