SCRIPT ERROR: @ls-radio/server/server.lua:21: attempt to index a nil value

ESX = nil

TriggerEvent('esx:getSharedObject', function(obj)
  ESX = obj
end)

ESX.RegisterUsableItem('radio', function(source)

    local xPlayer = ESX.GetPlayerFromId(source)
    TriggerClientEvent('ls-radio:use', source)

end)

Citizen.CreateThread(function()
  while true do
    Citizen.Wait(1000)
    local xPlayers = ESX.GetPlayers()
    for i=1, #xPlayers, 1 do
      local xPlayer = ESX.GetPlayerFromId(xPlayers[i]) 
      if xPlayer ~= nil then
        if xPlayer.getInventoryItem('radio').count == 0 then
          local source = xPlayers[i]
          TriggerClientEvent('ls-radio:onRadioDrop', source)

          break
        end
      end
    end
  end
end)