Why is this giving me a thing in output saying Infinite Yield Possible?

local gamePassService = game:GetService("GamePassService")

local closed_position = script.Parent.Position
local open_position = Vector3.new(434.199, 118.508, -78.223)
local passid = script.Parent.Gamepass:WaitForChild("Gamepass").Value

local opening = false
local closing = false

local function slideDoor(slideTime, startPos, endPos)
  	local movingOpen = opening
  	local loopBroken = false
    local slideInterval = (endPos - startPos) / (30 * slideTime)
    for i = 1, (30 * slideTime) do
    	if opening ~= movingOpen then
      		loopBroken = true
      		break
      	end
   		wait(1 / 30)
    	script.Parent.Position = script.Parent.Pos + slideInterval
    end
  	if not loopBroken then
    	opening = false
    	closing = false
  		script.Parent.Position = endPos
  	end
end 
--Test ok
while wait() do
  	local playersCloseBy = false
	for i, plr in pairs(game.Players:GetPlayers()) do
        if gamePassService:PlayerHasPass(plr, passid) and plr.Character then
      		print("Ye boi")
      		local distance = (plr.Character.Torso.Position - part_position).magnitude 
            if distance < 5 and not opening and script.Parent.Position ~= open_position then
      			playersCloseBy = true
            end
        end 
  	end
	if not playersCloseBy and not closing and script.Parent.Position ~= closed_Position then --Closes door
  		opening = false
  		closing = true
    	slideDoor(3, script.Parent.Position, closed_position)
	elseif playersCloseBy and not opening and script.Parent.Position ~= open_Position then --Opens door
  		opening = true
  		closing = false
  		slideDoor(3, script.Parent.Position, open_position)
  	end
end

22:08:31.411 - Infinite yield possible on 'Workspace.VIP.P2.Gamepass:WaitForChild("Gamepass")' Please help.