lol.khanacademy is a version of Khan Academy from a heckathon event, and it's ruining my grades.

I can't believe I've only ever found one post about this issue on this entire forum. So every time I go to Khan Academy and log in, My homescreen has a "lol.khanacademy" URL. This alone would not be a problem, besides being strange and kind of annoying. Additionally, ALL of my assignments are posted with details: "This assignment has no content". I cannot even click on ANY of my assignments, and as a result, have been receiving zeros in my grade book for every time a teacher assigns us homework from Khan Academy. I really hope that this issue can be resolved, as it is quite difficult to explain to teachers. They think I installed some sort of plugin that corrupted my account. Frankly, I don't blame them, because if a student showed me this problem I would think they were pulling my leg or trying to be funny. Please help ASAP. And yes, this happens on mobile AND PC.