Fatal error: Uncaught Error: Call to undefined function Roots\Soil\DisableTrackbacks\add_filter() in /home/zimmerma/public_html/wp-content/plugins/soil-3.7.1/modules/disable-trackbacks.php:19 Stack trace: #0 {main} thrown in /home/zimmerma/public_html/wp-content/plugins/soil-3.7.1/modules/disable-trackbacks.php on line 19