Player.CharacterAdded Tween Won't Play

[Vescena (res)]

Can someone expain why this won’t work, because I don’t understand.
I don’t know what to really try because this should be right unless I am missing something.

[cheesy_roblox190]

Are there any errors in the output? Is BlackScreen a valid parent of this script?

[Druiren]

I just realized it is inside a StarterGui.

The reason it is not playing the Tween is due to the character already being added beforehand.

If it is ResetOnSpawn Enabled:
Remove the Player.CharaceterAdded Function as it will just yield the script indefinitely

local player = game.players.LocalPlayer
local BlackScreen = script.Parent
local TweenService = game:GetService('TweenService')
local FadeTween = TweenService:Create(BlackScreen, TweenInfo.new(5), {BackgroundTransparency = 1})
FadeTween:Play()

If not then:
Place a :Play() Beforehand aswell

local player = game.players.LocalPlayer
local BlackScreen = script.Parent
local TweenService = game:GetService('TweenService')
local FadeTween = TweenService:Create(BlackScreen, TweenInfo.new(5), {BackgroundTransparency = 1})
FadeTween:Play()
player.CharacterAdded:Connect(function()
      FadeTween:Play()
end)

This should fix your issue, Let me know if there’s any errors!