Fatal error: Uncaught Error: Call to undefined function register_activation_hook() in /nfs/aesop1/hw00/d80/hscss/wordpress/wp-content/plugins/wpforms/includes/class-install.php:22 Stack trace: #0 /nfs/aesop1/hw00/d80/hscss/wordpress/wp-content/plugins/wpforms/includes/class-install.php(125): WPForms_Install->__construct() #1 {main} thrown in /nfs/aesop1/hw00/d80/hscss/wordpress/wp-content/plugins/wpforms/includes/class-install.php on line 22