I need help to make a Script warning script but it seems to all go wrong with my GUI?

I am a new Lua Coder and i tried to code a warning script where the moderator writes a message of warning to the specified user. But it seems to be going wrong, I tried to look online and change a few things but I seem to be getting the same error of this-

Error- SliceCenter ((507.000000,112.000000), (509.000000,113.000000)) is outside the bounds of imageOffset ((500.000000,112.000000), (501.000000,113.000000)) for GuiImage[CoreGui.TopBar.TopBarFrame.RightFrame.MoreMenu.MoreMenuContainer.OverlayContextualMenu.PositionFrame.BaseMenu.ClippingFrame.ScrollingFrame.cell 2.StateOverlay]

Here is my code.

local Name = game.Players.Name
local InputName = script.Parent.Parent.PlayerUsername.Text
local WarnReason = script.Parent.Parent.Reason.Text


script.Parent.Parent.WARN.MouseButton1Click()
if InputName == Name then
    script.Parent.Parent.WarningToPlayerNotify.Visible = true
    local WarnDisplay = Instance.new('TextLabel')

    -----Configuraitons-----
    WarnDisplay.BackgroundColor3 = {0,0,0}
    WarnDisplay.BackgroundTransparency = {0.5}
    WarnDisplay.Position = {0.238,-0.319}
    WarnDisplay.Size = {511,50}

    ---Text Configurations--
    WarnDisplay.Font = Enum.FontSize.Size14
    WarnDisplay.Font = Enum.Font.Code
    WarnDisplay.TextColor3 = {255,255,255}
    ------------------------

    ----Text Display Work---
    WarnDisplay.Text = 'Reason: '..WarnReason
    WarnDisplay.Text = 'Next Punishment: Mute|Kick or Ban'
    ------------------------

    wait(5)

    WarnDisplay.Visible = false
    script.Parent.Parent.WarningToPlayerNotify.Visible = false
end

if InputName ~= Name then
    script.Parent.Parent.WarningErrorMessage.Visible = true
    wait(5)
    script.Parent.Parent.WarningErrorMessage.Visible = false
end