Summary of the problem Fatal error while connecting to server Pack Version 1.2 What is the bug? I own a FTB Revelation server and i used to play in 2 different FTB Revelation server and all the servers i played have the same problem. The problem is players starting to get Fatal Error while they are trying to connect the server. Mod & Version Link to log file Is it repeatable? Known Fix The only fix i can find was finding random a FTB Revelation v1.2 public server join it, leave it then try to join to my own server and it fix the problem but it's just temporary fix..