Hello, Iam recently started using plugin FAuthSec ( dev.bukkit.org/bukkit-mods/authsec/ ) which is updated to 1.6.2 version. On Bukkit everything is fine and working as intended. However on latest Spigot #1047 server gives an error on player join. Plugin itself is still working but it is annoying for sure to be spammed like that. Error which it gives is: http://pastebin.com/7bt3aQsq In log there appears to be problem with "java.lang.NoClassDefFoundError: com/comphenix/protocol/events/PacketListener". I assume, since it is working perfectly on Bukkit, it could be Spigot problem related. Thanks!