Store GUI showing new frames in Roblox Studio, but not in Roblox Player?

i got this script from the other question. if it's the same. i changed the player

i did this here so if something is missing (like an end), you can add it

also if you was using a local script, you wont need a local script for this script below

changed the code

local Players = game:GetService("Players")
 
function onPlayerAdded(player)
     print(player.Name .. " has entered the game")


local gui = player.PlayerGui
 

local Store = gui.Store
 -- Don't use parent just put the gui in StarterGUI
local StoreBut = Store.StoreBut
local MainBack = Store.MainBack
local Trails = Store.Trails
local Hats = Store.Hats
local Guns = Store.Guns

MainBack.HatsButton.MouseButton1Click:connect(function() -- Use MouseButton1Click
MainBack.Visible = false
Hats.Visible = true 

end)

MainBack.SnipersButton.MouseButton1Click:connect(function() -- Use MouseButton1Click
MainBack.Visible = false
Guns.Visible = true 

end)

MainBack.EffectsButton.MouseButton1Click:connect(function() -- Use MouseButton1Click
MainBack.Visible = false
Trails.Visible = true 

end)

Hats.Exit.MouseButton1Click:connect(function()  
Hats.Visible = false
MainBack.Visible = true
end)

Guns.Exit.MouseButton1Click:connect(function()  
Guns.Visible = false
MainBack.Visible = true
end)

Trails.Exit.MouseButton1Click:connect(function()    
Trails.Visible = false
MainBack.Visible = true
end)

Hats.Exit.MouseButton1Click:connect(function()  
Hats.Visible = false
MainBack.Visible = true
end)

Guns.Exit.MouseButton1Click:connect(function()  
Guns.Visible = false
MainBack.Visible = true
end)

MainBack.Exit.MouseButton1Click:connect(function()  
MainBack.Visible = false
StoreBut.Visible = true
end)

StoreBut.TextButton.MouseButton1Click:connect(function()    
MainBack.Visible = true
StoreBut.Visible = false
end)
end


--When a player joins, call the onPlayerAdded function
Players.PlayerAdded:connect(onPlayerAdded)
 
--Call onPlayerAdded for each player already in the game
for _,player in pairs(Players:GetPlayers()) do
     onPlayerAdded(player)
end