Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/tcalculu/pmtdemo.tcalculus.com/wp-cont/pmt.tcalculus.com/wp-content/pluginsent/plugins/wc-frontend-manager/helpers/wcfm-core-functions.php:611 Stack trace: #0 {main} thrown in /home/tcalculu/pmtdemo.tcalculus.com/wp-cont/pmt.tcalculus.com/wp-content/pluginsent/plugins/wc-frontend-manager/helpers/wcfm-core-functions.php on line 611