Fatal error: Uncaught Error: Call to undefined method Elementor\Utils::is_ajax() in /home/h808042420/student.mtuci.ru/docs/wp-content/plugins/elementor-pro/modules/forms/classes/ajax-handler.php:33 Stack trace: #0 /home/h808042420/student.mtuci.ru/docs/wp-content/plugins/elementor-pro/modules/forms/module.php(176): ElementorPro\Modules\Forms\Classes\Ajax_Handler::is_form_submitted() #1 /home/h808042420/student.mtuci.ru/docs/wp-content/plugins/elementor/core/base/module.php(85): ElementorPro\Modules\Forms\Module->__construct() #2 /home/h808042420/student.mtuci.ru/docs/wp-content/plugins/elementor-pro/includes/modules-manager.php(56): Elementor\Core\Base\Module::instance() #3 /home/h808042420/student.mtuci.ru/docs/wp-content/plugins/elementor-pro/plugin.php(309): ElementorPro\Manager->__construct() #4 /home/h808042420/student.mtuci.ru/docs/wp-includes/class-wp-hook.php(292): ElementorPro\Plugin->on_elementor_init('') #5 /home/h808042420/student.mtuci.ru/docs/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters('', Arr in /home/h808042420/student.mtuci.ru/docs/wp-content/plugins/elementor-pro/modules/forms/classes/ajax-handler.php on line 33