Roblox Script Generated by ScripterAI

"Player is not a valid member of Player "Players.Cth4n" erroring line 3"

-- The error is because you are trying to access the player's name directly from the click parameter which is not valid. 
You should use the click parameter to get the player who clicked. Here's the corrected code:

-- local script 
local function onClick(player)
    local playerGui = player:WaitForChild("PlayerGui")

if Settings.WhitelistedPlayers[player.Name] or player:IsInGroup(Settings.MinID) then
        if not playerGui:FindFirstChild("selectGUI") then
            local clonedGui = gui:Clone()
            clonedGui.Parent = playerGui

toggleTween(clonedGui)

local RedButton = clonedGui.ImageLabel.Red    
            local BlueButton = clonedGui.ImageLabel.Blue
            local PurpleButton = clonedGui.ImageLabel.Purple
            local HexTextBox = clonedGui.ImageLabel:WaitForChild("HexTextBox")

local ConfirmButton = clonedGui.ImageLabel.ConfirmButton
            local IncreaseButton = clonedGui.ImageLabel.BrightnessDisplay.Increase
            local DecreaseButton = clonedGui.ImageLabel.BrightnessDisplay.Decrease

RedButton.MouseButton1Click:Connect(function()
                changeLightColor(Color3.fromRGB(255, 0, 0)) -- Red
            end)

BlueButton.MouseButton1Click:Connect(function()
                changeLightColor(Color3.fromRGB(0, 0, 255)) -- Blue
            end)

PurpleButton.MouseButton1Click:Connect(function()
                changeLightColor(Color3.fromRGB(128, 0, 255)) -- Purple (adjust RGB values as needed)
            end)

local Increase = clonedGui.Increase
            local Decrease = clonedGui.Decrease
            Increase.OnServerEvent:Connect(function(player, brightnessValue)
                increaseBrightness(brightnessValue)
            end)
            Decrease.OnServerEvent:Connect(function(player, brightnessValue)
                decreaseBrightness(brightnessValue)
            end)

local RemoteEvent = clonedGui.ChangeColor
            RemoteEvent.OnServerEvent:Connect(function(player, color)
                changeLightColor(color)
            end)

local exitButton = clonedGui.ImageLabel.Exit

exitButton.MouseButton1Click:Connect(function()
                clonedGui:Destroy()
            end)
        end
    end
end

script.Parent.ClickDetector.MouseClick:Connect(onClick)