Why do I have an index global error in my script?

Line 16 says "attempt to index global 'PEScaptain' (a nil value)

Script:

repeat wait() until game.Players.NumPlayers >= 2 

wait(3) 
local PESmembers = game.Teams:WaitForChild("PES"):GetPlayers() 
local FIFAmembers = game.Teams:WaitForChild("FIFA"):GetPlayers() 
local tool = game.ReplicatedStorage.Select

local PEScaptain = PESmembers[math.random(#PESmembers)] 
wait(1)
local FIFAcaptain = FIFAmembers[math.random(#FIFAmembers)]
print(PEScaptain.Name.." has been selected as the PES captain!!") 
 wait(1) 
print(PEScaptain.Name.." has been selected as the FIFA captain!!")

game.ReplicatedStorage["Select"]:Clone().Parent = PEScaptian.PlayerGui 
game.ReplicatedStorage["Select"]:Clone().Parent = FIFAcaptian.PlayerGui