Fatal error: Uncaught Error: Interface "Vc_Vendor_Interface" not found in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/js_composer/include/autoload/hook-vc-grid.php:7 Stack trace: #0 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/js_composer/include/autoload/hook-vc-grid.php on line 7