3.0.0 Fatal Error con Elementor 2.9

Just updated the plugin, as the changelog was telling me that the 3.0.0 “Added compatibility with Elementor Pro 3.0”, but I’m still using 2.9 and the WP went white.

2020/08/24 15:56:23 [error] 12446#12446: *3987329 FastCGI sent in stderr: "PHP message: PHP Fatal error:  Uncaught Error: Class 'ElementorPro\Core\Utils' not found in /home/xxx/xxx.it/wp-content/plugins/ele-custom-skin/theme-builder/conditions/loop.php:39
Stack trace:
#0 /home/xxx/xxx.it/wp-content/plugins/elementor-pro/modules/theme-builder/conditions/condition-base.php(66): ECS_Loop_Conditions->register_sub_conditions()
#1 /home/xxx/xxx.it/wp-content/plugins/ele-custom-skin/theme-builder/conditions/loop.php(67): ElementorPro\Modules\ThemeBuilder\Conditions\Condition_Base->__construct()
#2 /home/xxx/xxx.it/wp-includes/class-wp-hook.php(288): {closure}(Object(ElementorPro\Modules\ThemeBuilder\Classes\Conditions_Manager))
#3 /home/xxx/xxx.it/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters('', Array)
#4 /home/xxx/xxx.it/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#5 /home/xxx/xxx.it/wp-content/plugins/elementor-pro/modules/theme-builder/classes/conditions-manager.php(23" while reading response header from upstream, client: 146.241.0.199, server: www.xxx.it, request: "GET /wp-admin/ HTTP/2.0", upstream: "fastcgi://unix:/run/php/php7.0-fpm-xxx.sock:", host: "www.xxx.it"

Reverting back to
use ElementorPro\Classes\Utils;
seems to have the problem fixed.