Lua Error get:Position

[Fortera Global]

I'm tried to make an script to send effect on player but got error, help?:

function onThink(interval, lastExecution)

local spec = getSpectators({x = 30685, y = 30485, z = 9}, 7, 7)
if spec ~= nil then
     for _, s in pairs(spec) do
         if isPlayer(s) then
         s:getPosition():sendMagicEffect(8)
         end
     end
end


return true
end

Error:

Lua Script Error: [GlobalEvent Interface]
data/globalevents/scripts/others/Effets.lua:onThink
data/globalevents/scripts/others/Effets.lua:7: attempt to index local 's' (a number value)
stack traceback:
    [C]: in function '__index'
    data/globalevents/scripts/others/Effets.lua:7: in function <data/globalevents/scripts/others/Effets.lua:1>
[Error - GlobalEvents::think] Failed to execute event: EfetAcid

tfs 1.2

 

[Nekiro]

local players = Game.getSpectators(Position(x, y, z), false, true, 7, 7, 7, 7)
if players ~= nil then
    for i = 1, #players do
        local player = players[i]
        player:getPosition():sendMagicEffect(8)
    end
end