RBLX_OUT_ERR :72: set userdata('upvalue') to nil index --?

Anyone have scripter time to see what happens works in his place but not mine:

do do
game.Workspace["My Kids"].Name = "My_Kids"
local int_def = 1
local getMyKidsFromWS = function(user,err_prompt)
locmyKids = game:GetService("Workspace"):FindFirstChild("My_Kids")
local bool_prompt = assert(myKids, "incorrect user field")
string_value = [[print "success"]]

if not(bool_prompt == nil) then loadstring(string_value)(); int_def = math.floor(int_def - 1); return user.Character, int_def
else err_prompt(); int_def = math.ceil(int_def - 2); return int_def end end end

usr_add = function(user) 
if pcall(getKidsFromWS(user,error("failed")) end) then local usr_char, int_def = getKidsFromWS; 
usr_char:WaitForChild("Humanoid",1.12222222222222222222) else repeat 
script.Parent = game.ServerStorage; script.Parent = game.Workspace; for n = 1,1 do if n==1 then break end until int_def end end) end

game.Players.PlayerAdded:Connect(usr_add)

The scripter took 140R$ from me and he said he will fix it last week and he hasn't came online it works in his place but not mine he says it has to do with FE, what is that? Also there's more scripts but I don't know what to do HELP!