Fatal error: Uncaught Error: Call to undefined function WPDM\Elementor\API\add_action() in C:\xampp\htdocs\wp-content\plugins\wpdm-elementor\src\api\API.php:21 Stack trace: #0 C:\xampp\htdocs\wp-content\plugins\wpdm-elementor\src\api\API.php(14): WPDM\Elementor\API\API->__construct() #1 C:\xampp\htdocs\wp-content\plugins\wpdm-elementor\src\Main.php(43): WPDM\Elementor\API\API::getInstance() #2 C:\xampp\htdocs\wp-content\plugins\wpdm-elementor\src\Main.php(32): WPDM\Elementor\Main->__construct() #3 C:\xampp\htdocs\wp-content\plugins\wpdm-elementor\wpdm-elementor.php(21): WPDM\Elementor\Main::getInstance() #4 {main} thrown in C:\xampp\htdocs\wp-content\plugins\wpdm-elementor\src\api\API.php on line 21