Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/wemmbca/public_html/wp-content/plugins/ultimate-blocks/src/extensions/responsive-control/class-responsive-control.php:10 Stack trace: #0 /home/wemmbca/public_html/wp-content/plugins/ultimate-blocks/src/extensions/responsive-control/class-responsive-control.php(52): Ultimate_Blocks_Responsive_Control->__construct() #1 {main} thrown in /home/wemmbca/public_html/wp-content/plugins/ultimate-blocks/src/extensions/responsive-control/class-responsive-control.php on line 10