Error Code 400 When Editing Profiles

I installed GitLab to my server, and setup with my existing NGINX setup. Everything seems to be working fine… except for changing my user’s profile. I can’t change my username, profile picture, about, contacts, or anything.

Everything else works fine, I can create groups, repositories, etc. but editing user’s profile won’t work. I made sure that the profile image was the correct size, by editing it in photoshop, and reducing it to 197KB ( I made it smaller, 8-Bit, etc. ). However, no matter what combination of what I try and change for what user, I get 404.

I’m running the latest GitLab as-of posting, and the latest Ubuntu as-of posting.