Max Health increase in studio works perfectly but...?

Whenever I increase max health in studio when a stat is changed, the health regens to the max health. However, in the actual game, the health only regens up to 100 regardless of how much the max health is. Here is the script:

player = game.Players.LocalPlayer
local Str = player.Stats.Strength.Value
local Agi = player.Stats.Agility.Value
local Int = player.Stats.Intelligence.Value
local Def = player.Stats.Defense.Value
local Vit = player.Stats.Vitality.Value
local Dex = player.Stats.Dexterity.Value
local Damage = 0
local Speed = 0
local Critical = 0
local CriticalDamage = 0
local weapon

function damage()
    for j,k in pairs(player.Equip:GetChildren()) do
        if k.itemType.Value == "Weapon" then
            Damage = k.itemDamage.Value
            Speed = k.itemSpeed.Value
            Critical = k.itemCritical.Value
            CriticalDamage = k.itemCritDamage.Value
            weapon = k
            script.Parent.Parent.Information.ATKDMG.Text = "ATKDMG: " .. tostring(Damage)
            script.Parent.Parent.Information.CRITCHANCE.Text = "Critical %: " .. tostring(Critical) .. "%"
            script.Parent.Parent.Information.CRITDMG.Text = "Critical DMG: " .. tostring(CriticalDamage)
        end
    end
end

function removeDamage()
    if weapon == nil then
        Damage = 0
        Speed = 0
        Critical = 0
        CriticalDamage = 0
        script.Parent.Parent.Information.ATKDMG.Text = "ATKDMG: " .. tostring(Damage)
    end
end

function onstatChange(x)
    wait(0.03)
        --Health--
    if x == "Strength" then
        player.Character.Humanoid.MaxHealth = player.Character.Humanoid.MaxHealth+2
        player.Character.Humanoid.Health = player.Character.Humanoid.Health + 4
        script.Parent.Parent.Information.HP.Text = "HP: " .. tostring(player.Character.Humanoid.MaxHealth)
        script.Parent.Parent.Information.ATKDMG.Text = "ATKDMG: " .. tostring(Damage)
    end
    print("Lmao")
    if x == "Agility" then
        script.Parent.Parent.Information.ATKSpeed.Text = "ATKSpeed: " .. tostring(Speed)
    end
    if x == "Intelligence" then
        script.Parent.Parent.Information.MP.Text = "MP: " .. tostring((player.Stats.Intelligence.Value*4)+100)
    end
    if x == "Defense" then
        script.Parent.Parent.Information.damageResistance.Text = "DMG Resist%: " .. tostring(player.Stats.Defense.Value/5) .. "%"
    end
    if x == "Vitality" then
        player.Character.Humanoid.MaxHealth = player.Character.Humanoid.MaxHealth+4
        player.Character.Humanoid.Health = player.Character.Humanoid.Health + 4
        wait(0.1)
        script.Parent.Parent.Information.HP.Text = "HP: " .. tostring(player.Character.Humanoid.MaxHealth)
        script.Parent.Parent.Information.Stamina.Text = "Stamina: " .. tostring(player.PlayerGui.mainUI.statHolder.staminaHolder.staminaBar.MaxStamina.Value)
    end
    if x == "Dexterity" then
        script.Parent.Parent.Information.CRITCHANCE.Text = "Critical %: " .. tostring(Critical) .. "%"
        script.Parent.Parent.Information.CRITDMG.Text = "Critical DMG: " .. tostring(CriticalDamage)
    end
end

function addChar()
    wait(0.1)
    player.Character.Humanoid.MaxHealth = player.Character.Humanoid.MaxHealth+(2*Str)+(4*Vit)
    player.Character.Humanoid.Health = player.Character.Humanoid.MaxHealth
    script.Parent.Parent.Information.HP.Text = "HP: " .. tostring(player.Character.Humanoid.MaxHealth)
    script.Parent.Parent.Information.MP.Text = "MP: " .. tostring((player.Stats.Intelligence.Value*4)+100)
    script.Parent.Parent.Information.ATKSpeed.Text = "ATKSpeed: " .. tostring(Speed)
    script.Parent.Parent.Information.ATKDMG.Text = "ATKDMG: " .. tostring(Damage)
    script.Parent.Parent.Information.Stamina.Text = "Stamina: " .. tostring(player.PlayerGui.mainUI.statHolder.staminaHolder.staminaBar.MaxStamina.Value)
    script.Parent.Parent.Information.CRITCHANCE.Text = "Critical %: " .. tostring(Critical) .. "%"
    script.Parent.Parent.Information.CRITDMG.Text = "Critical DMG: " .. tostring(CriticalDamage)
end

player.CharacterAdded:Connect(addChar)
player.Equip.ChildAdded:Connect(damage)
player.Equip.ChildRemoved:Connect(removeDamage)
player.Stats.Strength.Changed:Connect(function()
    onstatChange("Strength")
end)
player.Stats.Agility.Changed:Connect(function()
    onstatChange("Agility")
end)
player.Stats.Intelligence.Changed:Connect(function()
    onstatChange("Intelligence")
end)
player.Stats.Defense.Changed:Connect(function()
    onstatChange("Defense")
end)
player.Stats.Vitality.Changed:Connect(function()
    onstatChange("Vitality")
end)
player.Stats.Dexterity.Changed:Connect(function()
    onstatChange("Dexterity")
end)

So I tried this in my local script

if x == "Strength" then
        game.ReplicatedStorage.AddHealth:FireServer()
        script.Parent.Parent.Information.HP.Text = "HP: " .. tostring(player.Character.Humanoid.MaxHealth)
        script.Parent.Parent.Information.ATKDMG.Text = "ATKDMG: " .. tostring(Damage)
    end

and in my server script in workspace

game.ReplicatedStorage.AddHealth.OnServerEvent:connect(function(player)
    player.Character.Humanoid.MaxHealth = player.Character.Humanoid.MaxHealth+2
end)

it says AddHealth is not a valid member