Problem with SephirothSpawn's Stat Skills

[F-chan]

hello everyone.
i decided to use sephirothspawn's stat skills, instead of his skill shop.
but i ran into some errors...
when i define the stats here

  #--------------------------------------------------------------------------
  # * Stat Dependent Skills (Based off ID)
  #  ~ actor_id => {skill_id => {stat_name => req_amt, ...}, ...}
  # * Stat Names
  #  ~ hp, sp, str, dex, agi, int
  #--------------------------------------------------------------------------
  Stat_Dependent_Skills_Actor = { 1 => {1 => {str => 5}}
  }

i get an error when i testplay my game.
an error in line 51 occurs. it says undefined variable. line 51 is this:

Stat_Dependent_Skills_Actor = { 1 => {1 => {str => 5}}

i'm also using Synthesize's Upgrade Customization V4.86, so all stats of my characters are 1 at the beginning of the game.