In order for Feed Them Social to work you must have allow_url_fopen = On, in your php.ini file. If it is not our shortcode will not output anything on the page.
If you want to check if this is On just add the code to the very bottom of your footer.php file in your theme. You can do this by following this link.
Then look for your footer.php file and add the code below to the very very bottom... then go to the front end of your website, scroll down, and look for the the field... allow_url_fopen. If it is set to Off, either change it to On or ask your host provider to do so. The php.ini file is usually located on the root of your server.
<?php phpinfo(); // Show just the module information. // phpinfo(8) yields identical results. phpinfo(INFO_MODULES); ?>