SO my server says this to anyone who tries to login? "failed to verify username, session authentication server unavailable." ??????????????????????????????????????????????????????????????
I had this error too, it seemed like it was something up with the Minecraft auth servers or the Minecraft launcher. It went away after a few hours. It may have been them playing around with newer versions of the launcher, after the problem stopped, my launcher was somehow updated.
It still persists after the launcher update. Anyone know if this is a plugin? EDIT by Moderator: merged posts, please use the edit button instead of double posting.