Script timeout: exhausted allowed execution time - lua

Question

When I was trying to make and run a script for coins in my game the output said "Script timeout: exhausted allowed execution time"
Script:
game.Players.PlayerAdded:Connect(function(player)
local Coins = Instance.new("IntValue")
Coins.Name = "Coins"
local coinvalue = Coins.Value
coinvalue = 0
Coins.Parent = player
wait(0.01)
if player.Name == "Vlo_tz" then
coinvalue = 25
end
wait(0.01)
local cointext = game.StarterGui.SideGuis.InventoryFrame.CoinsTextValue
while true do
cointext = coinvalue
end
end)

Answer 1

Your script is executing for too long without any kind of break.
The error is complaining that this loop has no exit case :
while true do
cointext = coinvalue
end
Adding a wait() inside the loop would get rid of the error, but it looks like you're using it to keep some kind of TextValue updated.
A safer way to do this is with event based callbacks. Instead of running a loop that will always try to update the cointext, you can listen for when the Coins value changes and then call a function to update it instead.
game.Players.PlayerAdded:Connect(function(player)
local Coins = Instance.new("IntValue")
Coins.Name = "Coins"
Coins.Value = 0
Coins.Parent = player
if player.Name == "Vlo_tz" then
Coins.Value = 25
end
-- update the gui whenever Coins changes
Coins.Changed:Connect(function()
-- find the player's copy of the UI, if it has loaded
-- (I'm assuming this is a TextValue and not a TextLabel)
local coinText = player.PlayerGui.SideGuis.InventoryFrame.CoinTextValue
-- keep this TextValue updated
coinText.Value = tostring(Coins.Value)
end)
end)