[FE] I want to click on the player and a gui to open but errors and I don't know how to fix?

Local script inside starter gui and when the player clicks it trys to checks if its a player. If its a player it will open a gui showing that players data. But that's not happening. It errors on line 20 and says "attempt to index local 'pPlayer' (a nil value)" Otherwise it will error because I clicked on the base plate or something. Here is the script, test it yourself and fix it if you feel like it. Or just redo it.

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local sb = script.Select
local gui = script.Parent["Game GUI"]
local hack = gui.Frames.Hack
local event = game:GetService("ReplicatedStorage").Remotes.AddCash

mouse.Move:Connect(function()
    local target = mouse.Target
    if target then
        if target.Parent:IsA("Model") or target.Parent.Parent:IsA("Model") and game.Players:FindFirstChild(target.Parent.Name) then
            local tPlayer = game.Players:GetPlayerFromCharacter(target.Parent)
            sb.Adornee = tPlayer and tPlayer.Character or nil
        end         
    end
end)

mouse.Button1Up:Connect(function(tar)
    local pPlayer = game.Players:GetPlayerFromCharacter(mouse.Target.Parent or mouse.Target.Parent.Parent)
    if pPlayer:FindFirstChild("Humanoid") then
        hack.Visible = true
        hack.Title.Text = pPlayer.Name
        hack.Bitcoins.Text = tostring(pPlayer.PlayerData.Bitcoins.Value)
        hack.Steal.MouseButton1Click:Connect(function()
            event:FireServer(pPlayer.PlayerData.Bitcoins.Value)
            pPlayer.PlayerData.Bitcoins.Value = 0
        end)
    else

    end
end)

hack.Close.MouseButton1Click:Connect(function()
    hack.Visible = false
end)