Error kicking players out

Code:

14.04 02:48:02 [Server] INFO [22:48:02 WARN]: Failed to save player data for Fousto2
14.04 02:48:02 [Server] INFO [22:48:02 INFO]: Removing player from memory: Fousto2
14.04 02:48:02 [Disconnect] User [22:48:02 INFO]: Fousto2 has disconnected, reason: Internal Exception: net.minecraft.util.io.netty.handler.codec.EncoderException: java.lang.RuntimeException: An internal error occured.

Can somebody explain a way to fix this? This player is unable to teleport back to the hub

It said its unable to save playerdata

 

1.7.8 handles players differently. Not by username, but by a unique id number. Sorry about that.

Please wait until a fix has been made for whichever plugin is causing this.

In the meantime, I'd downgrade if I were you. (To continue to have a functioning server)

 

We're using 1.7.5, not 1.7.8 because of the many problems server host's are experiencing with it.

 

post full log

 

http://pastebin.com/N1SNPQtZ

please somebody answer

EDIT by Moderator: merged posts, please use the edit button instead of double posting.