Fatal error: Uncaught Error: Class 'DOMDocument' not found in /var/www/test.hermannortho.hu/wp-content/plugins/gravityforms/gravityforms.php:6466 Stack trace: #0 /var/www/test.hermannortho.hu/wp-content/plugins/gravityforms/gravityforms.php(6408): GFForms::should_inject_hooks_js('<!DOCTYPE html>...') #1 [internal function]: GFForms::ensure_hook_js_output('<!DOCTYPE html>...', 9) #2 /var/www/test.hermannortho.hu/wp-includes/functions.php(4755): ob_end_flush() #3 /var/www/test.hermannortho.hu/wp-includes/class-wp-hook.php(287): wp_ob_end_flush_all('') #4 /var/www/test.hermannortho.hu/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #5 /var/www/test.hermannortho.hu/wp-includes/plugin.php(484): WP_Hook->do_action(Array) #6 /var/www/test.hermannortho.hu/wp-includes/load.php(1052): do_action('shutdown') #7 [internal function]: shutdown_action_hook() #8 {main} thrown in /var/www/test.hermannortho.hu/wp-content/plugins/gravityforms/gravityforms.php on line 6466