Can you help me?

[reyard]

Hi I have a problem with this simple addon.
It's the code:

local addonName = ...
local f = CreateFrame ("frame")
f.db = {}

f:RegisterEvent ("ADDON_LOADED")
f:RegisterEvent ("TALKINGHEAD_REQUESTED")

f:SetScript ("OnEvent", function (self, event, arg1)
	if (event == "TALKINGHEAD_REQUESTED") then
		local displayInfo, cameraID, vo, duration, lineNumber, numLines, name, text, isNewTalkingHead = C_TalkingHead.GetCurrentLineInfo()
		if (f.db.already_saw [vo]) then
			C_Timer.After (1, TalkingHeadFrame_CloseImmediately)
		else
			f.db.already_saw [vo] = true
		end
	elseif (event == "ADDON_LOADED" and arg1 == addonName) then
		TalkingHeadRemovalDB = TalkingHeadRemovalDB or {already_saw = {}}
		if (not TalkingHeadRemovalDB.already_saw) then
			TalkingHeadRemovalDB.already_saw = {}
		end
		f.db = TalkingHeadRemovalDB
	end
end)

It works fine but It have LUA error.

1x Usage: C_Timer.After(seconds, callback)
[string "=[C]"]: in function `After'
[string "@YouOnlyHearOnce/YouOnlyHearOnce.lua"]:14: in function <YouOnlyHearOnce/YouOnlyHearOnce.lua:10>

Locals:
(*temporary) = "Usage: C_Timer.After(seconds, callback)"

This addon is an automatic close for talking head frame.