Ops department is looking into this issue right now. We'll let you know when we've got an update.

DerpyNirvash

Did someone make an insignificant change that shouldn't have effected anything before the downtime, and it broke everything?

There was a live server issue that is causing this. As Wrel mentioned, Ops is troubleshooting and should have it fixed soon. No characters have been harmed, or lost, in this incident.