Undefined variable

Hi,

After the latest sharify update (3.1) I get some error:

Notice: Undefined variable: sharify_twitter_mention in /data01/virt27584/domeenid/www.denisskarpak.com/smartlist/wp-content/plugins/sharify/sharify.php on line 182

http://smartlist.ee/listing/goodhair/

What is that? And how to solve?

Cheers,
Deniss

https://ww.wp.xz.cn/plugins/sharify/