Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/wtsnake/public_html/wtsnake/wp-content/plugins/astra-sites/inc/classes/compatibility/sfwd-lms/class-astra-sites-compatibility-sfwd-lms.php:48 Stack trace: #0 /home/wtsnake/public_html/wtsnake/wp-content/plugins/astra-sites/inc/classes/compatibility/sfwd-lms/class-astra-sites-compatibility-sfwd-lms.php(37): Astra_Sites_Compatibility_SFWD_LMS->__construct() #1 /home/wtsnake/public_html/wtsnake/wp-content/plugins/astra-sites/inc/classes/compatibility/sfwd-lms/class-astra-sites-compatibility-sfwd-lms.php(106): Astra_Sites_Compatibility_SFWD_LMS::get_instance() #2 {main} thrown in /home/wtsnake/public_html/wtsnake/wp-content/plugins/astra-sites/inc/classes/compatibility/sfwd-lms/class-astra-sites-compatibility-sfwd-lms.php on line 48