Fatal error: Uncaught Error: Call to undefined function Cornerstone\Api\Controls\cs_register_control_partial() in /home/waterengineering/public_html/wp-content/plugins/cornerstone/includes/integration/Api/ApiControls.php:187 Stack trace: #0 {main} thrown in /home/waterengineering/public_html/wp-content/plugins/cornerstone/includes/integration/Api/ApiControls.php on line 187