Just a few minutes ago, my server started lagging super bad point-blank. Chat became delayed, as well with commands, and my easy rank plugin stopped working. I thought it was due to the Citizens plugin I just downloaded. So, I removed it, but when I rejoin, it's STILL lagging. My console says that it's a java.lang.NullPointerException. I don't know what to do so I can make it stop glitching and stuff. Everyone that joins experiences it. Any help?