gamemode error

local Player = FindMetaTable("Player")

function Player:AddStat(strStat, intAmount)
    self.Stats = self.Stats or {}
    if intAmount != 0 then
        local intDirection = math.abs(intAmount) / intAmount
        self:SetStat(strStat, self:GetStat(strStat) + (intDirection * math.ceil(math.abs(intAmount))))
    end
end

function Player:SetStat(strStat, intAmount)
    local tblStatTable = GAMEMODE.DataBase.Stats[strStat]
    self.Stats = self.Stats or {}
    local intOldStat = self.Stats[strStat] or 1
    self.Stats[strStat] = intAmount
    if SERVER then
        if tblStatTable.OnSet then
            tblStatTable:OnSet(self, intAmount, intOldStat)
        end
        SendUsrMsg("UD_UpdateStats", self, {strStat, intAmount})
    end
end

function Player:GetStat(strStat)
    self.Stats = self.Stats or {}
    if self.Stats && self.Stats[strStat] then
        return self.Stats[strStat]
    end
    return StatTable(strStat).Default
end

if SERVER then
    hook.Add("PlayerSpawn", "PlayerSpawn_Stats", function(ply)
        for name, stat in pairs(GAMEMODE.DataBase.Stats) do
            if ply.Stats then
                ply:SetStat(name, ply:GetStat(name))
                if stat.OnSpawn then
                    stat:OnSpawn(ply, ply:GetStat(name))
                end
            end
        end
        ply:AddStat("stat_agility", ply.ToMakeUpAgility or 0)
        ply.ToMakeUpAgility = 0
    end)
end

if CLIENT then
    usermessage.Hook("UD_UpdateStats", function(usrMsg)
        LocalPlayer():SetStat(usrMsg:ReadString(), usrMsg:ReadLong())
    end)
end