Adding Psychic Terrain Error

[Pok?mon Essentials version 17.2]
Exception: ArgumentError
Message: wrong number of arguments(0 for 1)
PokeBattle_Move:373:in `hasWorkingAbility'
PokeBattle_Move:373:in `pbTypeModifier'
PokeBattle_Battler:2539:in `pbSuccessCheck'
PokeBattle_Battler:2818:in `pbProcessMoveAgainstTarget'
PokeBattle_Battler:2814:in `each'
PokeBattle_Battler:2814:in `pbProcessMoveAgainstTarget'
PokeBattle_Battler:3290:in `pbUseMove'
PokeBattle_Battler:3270:in `loop'
PokeBattle_Battler:3293:in `pbUseMove'
PokeBattle_Battler:3491:in `pbProcessTurn'

# Paste this somewhere in PokeBattle_MoveEffects:

################################################################################
# For 5 rounds, creates a psychic terrain which boosts Psychic-type moves and
# protects Pok?mon from priority moves. Affects non-airborne Pok?mon only.
# (Psychic Terrain)
################################################################################
class PokeBattle_Move_159 < PokeBattle_Move
def pbEffect(attacker,opponent,hitnum=0,alltargets=nil,showanimation=true)
if @battle.field.effects[PBEffects::PsychicTerrain]>0
@battle.pbDisplay(_INTL("But it failed!"))
return -1
end
pbShowAnimation(@id,attacker,nil,hitnum,alltargets,showanimation)
@battle.field.effects[PBEffects::ElectricTerrain]=0
@battle.field.effects[PBEffects::MistyTerrain]=0
@battle.field.effects[PBEffects::GrassyTerrain]=0
if attacker.hasWorkingItem(:TERRAINEXTENDER)
@battle.field.effects[PBEffects::PsychicTerrain]=8
else
@battle.field.effects[PBEffects::PsychicTerrain]=5
end
@battle.pbDisplay(_INTL("The battlefield got weird!"))
if attacker.hasWorkingItem(:PSYCHICSEED)
if attacker.pbIncreaseStatWithCause(PBStats::SPDEF,1,attacker,PBItems.getName(attacker.item))
attacker.pbConsumeItem
end
end
return 0
end
end


# In PBEffects, paste this under "These effects apply to the battle (i.e. Both sides)":

PsychicTerrain = 13

# In PokeBattle_ActiveSideField, paste this under "def initialize", IN THE LIST THAT INCLUDES OTHER TERRAIN MOVES!

@effects[PBEffects::PsychicTerrain] = 0


# In PokeBattle_Battler, under "target.pbOwnSide.effects[PBEffects::QuickGuard]" after the "end", paste this:

if @battle.field.effects[PBEffects::PsychicTerrain]>0 && p>0 && !target.isAirborne?
@battle.pbDisplay(_INTL("The Psychic Terrain protected {1}!",target.pbThis))
PBDebug.log("[Move failed] Psychic Terrain stopped the attack")
return false
end


# In PokeBattle_Move, LOOK for the following lines:

if @battle.field.effects[PBEffects::MistyTerrain]>0 &&
!opponent.isAirborne?(attacker.hasMoldBreaker) && isConst?(type,PBTypes,:DRAGON)
damagemult=(damagemult*0.5).round
end

# And paste this underneath:

if @battle.field.effects[PBEffects::PsychicTerrain]>0 && !attacker.isAirborne? && isConst?(type,PBTypes,:PSYCHIC)
damagemult=(damagemult*1.5).round
end