attempt to index nil with 'Parent'????

Help me pls! Error Players.OsipStar4ik.PlayerScripts.NameTagGiver:36: attempt to index nil with 'Parent' Script

local plr = game.Players.LocalPlayer
local vipServerOwnerId = game.ReplicatedStorage.Interactions.Server.GetVIPServerOwnerID:InvokeServer()

local specialColors = {}
specialColors["635035673"] = Color3.fromRGB(255, 221, 0) -- BlockyShadows

function givePlayerNameTag(thisPlr)

    -- Make sure player
    local chr = thisPlr.Character
    if chr ~= nil and thisPlr ~= plr then

        -- Create nametag
        local tag = script.NameTag:clone()

        -- Set information
        tag.Label.Text = thisPlr.Name
        if thisPlr.UserId == vipServerOwnerId then
            tag.Label.Text = "[SERVER OWNER] " .. thisPlr.Name
            tag.Label.TextColor3 = Color3.fromRGB(255, 0, 255)
        elseif thisPlr.UserId == "erer" then
            tag.Label.Text = "[CREATOR] " .. thisPlr.Name
            tag.Label.TextColor3 = Color3.fromRGB(255, 0, 0)
        end
    elseif thisPlr.UserId == "OsipStar4ik" then
        tag.Label.Text = "[DEVELOPER] " .. thisPlr.Name
        tag.Label.TextColor3 = Color3.fromRGB(255, 0, 0)
    end
    for id, c in pairs(specialColors) do
        if tostring(thisPlr.UserId) == id then
            tag.Label.TextColor3 = c
        end
    end

    -- Add to head
    tag.Parent = chr:WaitForChild("Head")

end


game.Players.PlayerAdded:connect(function(thisPlr)

    -- Assign event
    thisPlr.CharacterAdded:connect(function()
        givePlayerNameTag(thisPlr)
    end)
    givePlayerNameTag(thisPlr)

end)

for _, i in pairs(game.Players:GetPlayers()) do
    i.CharacterAdded:connect(function()
        givePlayerNameTag(i)
    end)
    givePlayerNameTag(i)
end