Fatal error: Uncaught Error: Call to undefined function add_filter() in /opt/bitnami/wordpress-rendytrendy/htdocs/wp-content/themes/twentynineteen/inc/icon-functions.php:61 Stack trace: #0 {main} thrown in /opt/bitnami/wordpress-rendytrendy/htdocs/wp-content/themes/twentynineteen/inc/icon-functions.php on line 61