Why does the script kill my game whenever I try to run it?

When the script gets to "while true do" it simply crashes my studio, I added the 5 second wait already just to make sure about what exactly was making the game crash... What is wrong about this?

local player = game.Players.LocalPlayer

repeat wait() until player.Character ~= nil
repeat wait() until player.Character:FindFirstChild("Humanoid")


print("Started working")


script.Parent.MainFrame:WaitForChild("CharacterPortrait")

local imageP = script.Parent.MainFrame.CharacterPortrait.PlayerImage
local level = player.Stats.level.Value
local name = player.Name
imageP.Image = "https://www.roblox.com/bust-thumbnail/image?userId=" ..player.UserId.. "&width=420&height=420&format=png"
script.Parent.MainFrame.CharacterPortrait.Level.Text = level
script.Parent.MainFrame.Name1.Text = name
script.Parent.MainFrame.Name2.Text = name

wait(5)

while true do
	
	
if player.Character:FindFirstChild("Humanoid") ~= nil then
	

script.Parent.MainFrame.HealthBar.HP.Text = "HP: " .. math.floor(player.Character.Humanoid.Health) .. " / " .. player.Character.Humanoid.MaxHealth

	
end
end

Easy problem.

Solution: Never use while true do without wait(), it's a game crasher.

Try making it while wait(0.1) do or add wait(0.1) somewhere in the loop, and your game will not crash anymore!

Just add a Wait() at the end of the loop :

-- This is an exemple

char = game.Players.LocalPlayer.Character.Humanoid

while true do
	char.WalkSpeed = char.WalkSpeed + 5
	wait(.1)
end

So if you Don't want your script to crash roblox, add a wait at the end of the loop just like i did.