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

--You cant use

game.Players.LocalPlayer

--In a script you can only use it in a local script