Can't upload anything

Every time I try to upload a score it just won't let me. I tried on multiple accounts and on different devices and it won't work. It allows me to select a file and "save" it, but when I click on save nothing happens. I don't think it's the file size because I know there are bigger files on here than mine (even though mine's pretty big). I am trying to update my medley and it has gotten to the point where whenever I work on it it slows my computer down a lot, but even in the past it's been able to work without problems. Anyone know how to help?