script that for some reason doesn't want to work anymore

-- Function to create the GUI with a draggable border and a scrolling frame
local function createGUI()
    local screenGui = Instance.new("ScreenGui")
    screenGui.Name = "NPCListGui"
    screenGui.Parent = game.Players.LocalPlayer:WaitForChild("PlayerGui")

    local frame = Instance.new("Frame")
    frame.Size = UDim2.new(0.3, 0, 0.5, 0)
    frame.Position = UDim2.new(0.35, 0, 0.25, 0)
    frame.BackgroundColor3 = Color3.fromRGB(0, 0, 0)
    frame.BackgroundTransparency = 0.5
    frame.BorderSizePixel = 2
    frame.BorderColor3 = Color3.fromRGB(255, 255, 255)
    frame.Parent = screenGui

    local titleLabel = Instance.new("TextLabel")
    titleLabel.Size = UDim2.new(1, 0, 0.1, 0)
    titleLabel.Position = UDim2.new(0, 0, 0, 0)
    titleLabel.Text = "Test"
    titleLabel.TextColor3 = Color3.fromRGB(255, 255, 255)
    titleLabel.BackgroundTransparency = 1
    titleLabel.Parent = frame

    local scrollingFrame = Instance.new("ScrollingFrame")
    scrollingFrame.Size = UDim2.new(1, 0, 0.9, 0)
    scrollingFrame.Position = UDim2.new(0, 0, 0.1, 0)
    scrollingFrame.BackgroundColor3 = Color3.fromRGB(30, 30, 30)
    scrollingFrame.BackgroundTransparency = 0.5
    scrollingFrame.BorderSizePixel = 0
    scrollingFrame.ScrollBarThickness = 12
    scrollingFrame.CanvasSize = UDim2.new(0, 0, 0, 0)
    scrollingFrame.Parent = frame

    local uiListLayout = Instance.new("UIListLayout")
    uiListLayout.Parent = scrollingFrame
    uiListLayout.FillDirection = Enum.FillDirection.Vertical
    uiListLayout.SortOrder = Enum.SortOrder.Name

    -- Function to create the draggable border
    local function addDraggable(frame)
        local dragging = false
        local dragInput, mousePos, framePos

        local function update(input)
            local delta = input.Position - mousePos
            frame.Position = UDim2.new(framePos.X.Scale, framePos.X.Offset + delta.X, framePos.Y.Scale, framePos.Y.Offset + delta.Y)
        end

        frame.InputBegan:Connect(function(input)
            if input.UserInputType == Enum.UserInputType.MouseButton1 then
                dragging = true
                mousePos = input.Position
                framePos = frame.Position
                input.Changed:Connect(function()
                    if input.UserInputState == Enum.UserInputState.End then
                        dragging = false
                    end
                end)
            end
        end)

        frame.InputChanged:Connect(function(input)
            if input.UserInputType == Enum.UserInputType.MouseMovement then
                dragInput = input
            end
        end)

        game:GetService("UserInputService").InputChanged:Connect(function(input)
            if input == dragInput and dragging then
                update(input)
            end
        end)
    end

    addDraggable(frame)

    return scrollingFrame
end

-- Function to create a button for a boss
local function createButton(bossName, parent)
    local button = Instance.new("TextButton")
    button.Size = UDim2.new(1, 0, 0, 50)
    button.Text = bossName
    button.TextColor3 = Color3.fromRGB(255, 255, 255)
    button.BackgroundColor3 = Color3.fromRGB(0, 0, 0)
    button.BackgroundTransparency = 0.5
    button.Parent = parent

    button.MouseButton1Click:Connect(function()
        -- Find the boss by name and change to R15
        local boss = game.Workspace:FindFirstChild("NPCs"):FindFirstChild("Boss"):FindFirstChild(bossName)
        if boss and boss:IsA("Model") then
            local humanoid = boss:FindFirstChildOfClass("Humanoid")
            if humanoid then
                -- Change the boss to R15
                humanoid.RigType = Enum.HumanoidRigType.R15
            end
        end
    end)
end

-- Function to update the interface with the bosses
local function updateBossInterface()
    local scrollingFrame = createGUI()
    local bossesFolder = game.Workspace:FindFirstChild("NPCs") and game.Workspace.NPCs:FindFirstChild("Boss")

    if not bossesFolder then
        local noBossesLabel = Instance.new("TextLabel")
        noBossesLabel.Size = UDim2.new(1, 0, 1, 0)
        noBossesLabel.Text = "Boss folder not found."
        noBossesLabel.TextColor3 = Color3.fromRGB(255, 0, 0)
        noBossesLabel.BackgroundTransparency = 1
        noBossesLabel.Parent = scrollingFrame
        return
    end

    for _, boss in pairs(bossesFolder:GetChildren()) do
        if boss:IsA("Model") then
            createButton(boss.Name, scrollingFrame)
        end
    end

    -- Update the CanvasSize of the ScrollingFrame based on the number of buttons
    local totalButtonsHeight = #bossesFolder:GetChildren() * 50 -- 50 is the height of each button
    scrollingFrame.CanvasSize = UDim2.new(0, 0, 0, totalButtonsHeight)
end

-- Update the interface when the script runs
updateBossInterface()