Undefined index

Getting this when I update menus, have been getting it since WordPress 4.0

Notice: Undefined variable: post_types in /var/www/htpcguides.com/wp-content/plugins/social-networks-auto-poster-facebook-twitter-g/NextScripts_SNAP.php on line 254

https://wordpress.org/plugins/social-networks-auto-poster-facebook-twitter-g/