Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/revitysolutions/Dev.revitysolutions.com/waqas/wp-includes/interactivity-api/interactivity-api.php:73 Stack trace: #0 {main} thrown in /home/revitysolutions/Dev.revitysolutions.com/waqas/wp-includes/interactivity-api/interactivity-api.php on line 73