I wasn't going to post this at all, since it's been resolved for us, but maybe it can be helpful or someone knows why it happened. About 15min ago my users started messaging me that they were getting constant database errors. So I logged into the admin area and it looked like this: The whole site either looked like the CSS had been removed or it would spit out a database error. I checked every site I have hosted on the same web server, they all functioned fine; some on the same database. So I assume it had to be Xenforo. I rebooted the server and the problem went away. Anyone know what could have caused it?