Other server reason for fail to connect

14:08:49  [Info] [NetHandlerLoginServer]: UUID of player femblemore is 60a45f03-0b95-48e2-8165-e4e5ba74cbae.
14:08:49  [Info] [FML]: Client protocol version 2.
14:08:49  [Info] [FML]: Client attempting to join with 171 mods.
14:08:49  [Info] [journeymap]: CLIENT.
14:08:50  [Info] [ViesCraft]: Logged in Server.
14:08:50  [Warn] [NetworkSystem]: Failed to handle packet for /184.54.254.106:53408
14:08:51  [Info] [NetHandlerPlayServer]: femblemore lost connection: Internal server error.
14:08:51  [Info] [DedicatedServer]: femblemore left the game
14:08:51  [Info] [chancecubes]: No custom rewards detected for the current user!.