Fatal error: Uncaught Error: Class "Elementor\Core\Base\Background_Task_Manager" not found in /htdocs/wp-content/plugins/elementor/core/base/db-upgrades-manager.php:12
Stack trace:
#0 /htdocs/wp-content/plugins/elementor/includes/autoloader.php(294): require()
#1 /htdocs/wp-content/plugins/elementor/includes/autoloader.php(330): Elementor\Autoloader::load_class('Core\\Base\\DB_Up...')
#2 /htdocs/wp-content/plugins/elementor/core/upgrade/manager.php(10): Elementor\Autoloader::autoload('Elementor\\Core\\...')
#3 /htdocs/wp-content/plugins/elementor/includes/autoloader.php(294): require('/htdocs/wp-cont...')
#4 /htdocs/wp-content/plugins/elementor/includes/autoloader.php(330): Elementor\Autoloader::load_class('Core\\Upgrade\\Ma...')
#5 /htdocs/wp-content/plugins/elementor/core/experiments/manager.php(162): Elementor\Autoloader::autoload('Elementor\\Core\\...')
#6 /htdocs/wp-content/plugins/elementor/core/experiments/manager.php(97): Elementor\Core\Experiments\Manager->install_compare('3.3.0')
#7 /htdocs/wp-content/plugins/elementor/core/experiments/manager.php(353): Elementor\Core\Experiments\Manager->add_feature(Array)
#8 /htdocs/wp-content/plugins/elementor/core/experiments/manager.php(541): Elementor\Core\Experiments\Manager->add_default_features()
#9 /htdocs/wp-content/plugins/elementor/core/experiments/manager.php(1026): Elementor\Core\Experiments\Manager->init_features()
#10 /htdocs/wp-content/plugins/elementor/includes/plugin.php(706): Elementor\Core\Experiments\Manager->__construct()
#11 /htdocs/wp-content/plugins/elementor/includes/plugin.php(647): Elementor\Plugin->init_components()
#12 /htdocs/wp-includes/class-wp-hook.php(324): Elementor\Plugin->init('')
#13 /htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#14 /htdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#15 /htdocs/wp-settings.php(704): do_action('init')
#16 /htdocs/wp-config.php(85): require_once('/htdocs/wp-sett...')
#17 /htdocs/wp-load.php(50): require_once('/htdocs/wp-conf...')
#18 /htdocs/wp-blog-header.php(13): require_once('/htdocs/wp-load...')
#19 /htdocs/index.php(17): require('/htdocs/wp-blog...')
#20 {main}
thrown in /htdocs/wp-content/plugins/elementor/core/base/db-upgrades-manager.php on line 12