Fatal error: Uncaught Error: Call to undefined function add_action() in /var/www/html/Brands/Halo_Condo/04_hl_subaccount_config/halo-bookings-endpoint.php:12 Stack trace: #0 {main} thrown in /var/www/html/Brands/Halo_Condo/04_hl_subaccount_config/halo-bookings-endpoint.php on line 12