[RMVX ACE] NEED HELP! GET AN EXTRA TURN WHEN YOU GET A CRITICAL HIT

I've been trying to modify and add a new script that if your character get's an critical hit on an enemy you get an extra turn. I'm using the Free Turn Battle System made by yanfly and I tried using things such as

You're going to have to redefine apply_critical a bit to make it work.
def apply_critical(user, damage)
user.add_state(id)
return damage * 3
end

and

value = item.damage.eval(user, self, $game_variables)
value *= item_element_rate(user, item)
value *= pdr if item.physical?
value *= mdr if item.magical?
value *= rec if item.damage.recover?
value = apply_critical(user, value) if @result.critical
value = apply_variance(value, item.damage.variance)
value = apply_guard(value)
@result.make_damage(value.to_i, item)

Both of them crash the game when either my character get's a critical hit on an enemy or the other way around can anyone help me out with this?

I did apply a state to it, that state boosts a characters agility hence get him/her an extra turn since i'm using the Yanfly Free Turn Battle System, it just when someone get's a critical this message pops up

Script 'Game_Battler' line 357:: ArgumentError Occurred wrong number of arguments (2 for 1)

Also I'm using this script

class Game_Battler < Game_BattlerBase

#--------------------------------------------------------------------------
# * Get Element Modifier for Skill/Item
#--------------------------------------------------------------------------
def item_element_rate(user, item)
if item.damage.element_id < 0
the_rate = (user.atk_elements.empty? ? 1.0 : elements_max_rate(user.atk_elements))
else
the_rate = (element_rate(item.damage.element_id))
end
if the_rate >= 2
user.add_state(26)
end
return the_rate
end

end

This script works in getting an extra turn when I hit an enemy with an element that it's weak against is there a chance that I can modify this so get an extra turn when any of my characters get's a critical on an enemy?

Everything else works in the playtest and battle test it just the line 357 game_batter thing that keeps popping up