Fatal error: Uncaught Error: Class 'Elementor\Core\Upgrade\Manager' not found in /wp-content/plugins/elementor/core/upgrade/manager.php:10 Stack trace: #0 /wp-content/plugins/elementor/includes/autoloader.php(294): require() #1 /wp-content/plugins/elementor/includes/autoloader.php(330): Elementor\Autoloader::load_class('Core\\Upgrade\\Ma...') #2 [internal function]: Elementor\Autoloader::autoload('Elementor\\Core\\...') #3 /wp-content/plugins/elementor/core/experiments/manager.php(94): spl_autoload_call('Elementor\\Core\\...') #4 /wp-content/plugins/elementor/core/experiments/manager.php(317): Elementor\Core\Experiments\Manager->add_feature(Array) #5 /wp-content/plugins/elementor/core/experiments/manager.php(467): Elementor\Core\Experiments\Manager->add_default_features() #6 /wp-content/plugins/elementor/core/experiments/manager.php(884): Elementor\Core\Experiments\Manager->init_features() #7 /wp-content/plugins/elementor/includes/plugin.php(706): Elementor\Core\Experiments\Manager->__construct() #8 /wp-content/plugins/el in /wp-content/plugins/elementor/core/upgrade/manager.php on line 10