Add-on Hide links from guests

Any working add-on for this subject? I wrote a very little and quick add-on without any option (just warning html text) but i am not sure if it is already an add-on like that?
 
Friends I just downloaded the addon from https://xenforo.com/community/resources/tlk-hide-links-from-guests.5513/ but I do not know how to install this as I am totally new to this forum.
When I import that XML file in my ACP I get the following error;
Error
Callback TilkiBey_HLFG_Listener::load_class_bb_code is invalid (Invalid Class).

Appreciate your help please and setp by step guide to install it as I just installed my new fresh copy of this forum :)
https://xenforo.com/help/add-ons/
You can get help from this page

Anyway;
https://xenforo.com/community/resources/tlk-hide-links-from-guests.5513/

Download add-on's zip file from this url to your computer and unzip it
upload "library" folder to your forum's root directory
After uploading, import xml file from acp
 
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