Yep. Same here. It is missing perhaps something along the lines of
if ( !empty($options['li']) )
in line 37 of inc/nxs_snap_class.php
It is not a good idea to change a distribution file without bumping a version, guys!!! Stop doing that! You throw off all of the automated systems we have in place for version and intrusion control!
This issue has been fixed in the latest version. Please update your plugin.
https://wordpress.org/plugins/social-networks-auto-poster-facebook-twitter-g/changelog/
3.4.18 [05/18/2015]
Bug Fix – [Critical] Fix “Warning: Invalid argument supplied for foreach() in ‘***’ on line 37”.