Time() attempt to perform arithmetic on a nil value (field '?')

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1

Hello everyone. I can't understand what's going on. The script works, but it constantly gives an error. Here are the parts of the code:

local durationTime = 10
local startTime = {}
local correntTime = {}

function handleOverlap(trigger, player)
    if player ~= nil and player:IsA("Player") then
      startTime[player] = time()
      player:SetResource("StimulantBigHP", 1)
 ....... 
    end
end

function bigHPEnd (player)
  if player:GetResource("StimulantBigHP") == 1 then
    correntTime[player] = time()
      if correntTime[player] < startTime[player] + durationTime then  
.......
      end
    end
end
function Tick()
	for _, player in pairs(Game.GetPlayers()) do
		bigHPEnd(player)
	end
end

An error pops up all the time in this line (attempt to perform arithmetic on a nil value (field '?')):

 if correntTime[player] < startTime[player] + durationBigHPTime then

But at the same time, the code works. Can anyone tell me what's wrong?