Elementor 3.15.x seemed to have changed a specific class’s loading order and may result in a error which prevents saving in Customizer.
The solution is either to rollback Elementor to 3.14.x or to follow the steps below which require a specific file to be edited.
An alternative solution is to paste these lines below into this file /wp-content/plugins/rey-core/inc/elementor/editor.php around the line 286 . Here’s a quick video how to add the code https://d.pr/v/YsLP6i .
if( ! class_exists('\Elementor\Core\Schemes\Base') ){
return;
}An update is coming this weekend.