Help with Lua

[Gaver]

Hello i am new in the forum and i am kind need help to fix an addone after the new update :
the addone is : premade-filter
here is the last updated :
https://github.com/Tga123/premade-filter/commits/master

Here is the Errors :
Message: Interface\AddOns\premade-filter\premade-filter.lua:2587: Usage: GetActivityInfo(activityID)
Time: Thu Dec 13 17:43:39 2018
Count: 1
Stack: Interface\AddOns\premade-filter\premade-filter.lua:2587: Usage: GetActivityInfo(activityID)
[C]: in function `GetActivityInfo'
Interface\AddOns\premade-filter\premade-filter.lua:2587: in function `LFGListSearchPanel_UpdateResultList'
Interface\FrameXML\LFGList.lua:1656: in function `onEvent'
Interface\FrameXML\LFGList.lua:203: in function <Interface\FrameXML\LFGList.lua:120>

Locals: (*temporary) = nil

the addone stop searching if i typed

i need help with the new AP changes in Lua