[Plugin: Like To Keep Reading] Problem When cookies cleared

Hi I am using the Like to keep reading plugin in the website,

https://www.theunionbar.co.za/

Once an user login using facebook, he needs to like our website to make reservation. It works great!!!

The problem is once the user likes and login after clearing the cookies, he cannot view the content, the user is asked to like again to view the content but the like button is disabled.
Please see the following screenshot of what I get

https://www.theunionbar.co.za/fblike.png

Please help me with this problem, thank you very much!!!

https://www.ads-software.com/extend/plugins/like-to-keep-reading/