Your game stopped sending PB screenshots to the server. You were banned by a plugin that checks for this. I have removed the ban, but you may want to check to see if your video drivers and PB are up to date.
These screenshots are sent by everybody's game automatically. I use a plugin on the server to check to see if these are being sent. If a player's game fails to send 3 in a row then the server issues a ban. If I can find no evidence of cheating, I remove the bans. You appear to be clean, so I removed your ban.