Go to : Server\gameserver\config\powerpak\powerpak.properties And Enable The Buffer.
# Do you want enable powerpack?
PowerPakEnabled = True
# Npc Buffer - scheme buffer - set buffs - single buffs
BufferNpcId = 50019
BufferEnabled = True
BufferUseCommand = False
BufferCommand = buffs
BufferPrice = 1000
BufferUseBBS = False
BufferExcludeOn = RB OLYMPIAD PVP SIEGE EVENT ATTACK