Errors when submit form ElementorPro v2.8.5

ElementorPro seems to have moved things around.

to FIX I changed this path…
around line 232 of class-mailster-action-after-submit.php

$mailster_data['ip']     = \ElementorPro\Core\Utils::get_client_ip();
//to
$mailster_data['ip']     = \ElementorPro\Classes\Utils::get_client_ip();

Version info

Elementor v2.9.5
Elementor Pro v2.8.5

* Class Mailster_Action_After_Submit
 *
 * @package Integrate_Elementor_Form_with_Mailster/Includes/Mailster_Action_After_Submit
 * @since   1.0.0
 * @version 1.1.1

Error log

[30-Sep-2020 14:23:11 UTC] PHP Fatal error:  Uncaught Error: Class 'ElementorPro\Core\Utils' not found in /var/www/html/wp-content/plugins/integrate-elementor-form-with-mailster/includes/class-mailster-action-after-submit.php:232
Stack trace:
#0 /var/www/html/wp-content/plugins/elementor-pro/modules/forms/classes/ajax-handler.php(124): Mailster_Action_After_Submit->run(Object(ElementorPro\Modules\Forms\Classes\Form_Record), Object(ElementorPro\Modules\Forms\Classes\Ajax_Handler))
#1 /var/www/html/wp-includes/class-wp-hook.php(287): ElementorPro\Modules\Forms\Classes\Ajax_Handler->ajax_send_form('')
#2 /var/www/html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters('', Array)
#3 /var/www/html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#4 /var/www/html/wp-admin/admin-ajax.php(176): do_action('wp_ajax_element...')
#5 {main}
  thrown in /var/www/html/wp-content/plugins/integrate-elementor-form-with-mailster/includes/class-mailster-action-after-submit.php on line 232
[30-Sep-2020 14:49:45 UTC] PHP Notice:  Undefined index:  in /var/www/html/wp-content/plugins/integrate-elementor-form-with-mailster/includes/class-mailster-action-after-submit.php on line 228
[30-Sep-2020 14:49:45 UTC] PHP Notice:  Undefined index:  in /var/www/html/wp-content/plugins/integrate-elementor-form-with-mailster/includes/class-mailster-action-after-submit.php on line 228