How do i fix 'Attempt to call a nil value'?

I wanted to make a script for an admin panel that, when you press +100 it adds 100 credits to the targeted player's credits intValue, but i get the output Attempt to call a nil value?

local currentTarget = script.Parent.Text
local player = game.Players.LocalPlayer
script.Parent.Parent.okButton.MouseButton1Click:Connect(function()
script.Parent.Parent.playerNameCn.Text = currentTarget
	script.Parent.Parent.playerTarget.Visible = false
	script.Parent.Parent.playerNameCn.Visible = true
script.Parent.Parent.p100.MouseButton1Click:Connect()
	game.Players[currentTarget].leaderstats.Credits.Value = game.Players[currentTarget].leaderstats.Credits.Value + 100
end)
script.Parent.Parent.back.MouseButton1Click:Connect(function()
	script.Parent.Parent.playerNameCn.Text = "nameHolder"
	script.Parent.Parent.playerNameCn.Visible = false
	script.Parent.Parent.playerTarget.Visible = true
end)