Fatal error: Uncaught Error: Call to undefined function register_activation_hook() in /home/clmepl5/public_html/web/app/plugins/gravityview/includes/class-gravityview-admin-notices.php:18 Stack trace: #0 {main} thrown in /home/clmepl5/public_html/web/app/plugins/gravityview/includes/class-gravityview-admin-notices.php on line 18