Fatal error: Uncaught Error: Undefined class constant 'ALERT' in /srv/users/testars/apps/testars/public/wp-content/themes/hello-elementor/includes/settings/settings-header.php:87 Stack trace: #0 /srv/users/testars/apps/testars/public/wp-content/plugins/elementor/core/kits/documents/tabs/tab-base.php(43): HelloElementor\Includes\Settings\Settings_Header->register_tab_controls() #1 /srv/users/testars/apps/testars/public/wp-content/plugins/elementor/core/kits/documents/kit.php(158): Elementor\Core\Kits\Documents\Tabs\Tab_Base->register_controls() #2 /srv/users/testars/apps/testars/public/wp-content/plugins/elementor/includes/base/controls-stack.php(2282): Elementor\Core\Kits\Documents\Kit->register_controls() #3 /srv/users/testars/apps/testars/public/wp-content/plugins/elementor/includes/base/controls-stack.php(494): Elementor\Controls_Stack->init_controls() #4 /srv/users/testars/apps/testars/public/wp-content/plugins/elementor/includes/base/controls-stack.php(300): Elementor\Controls_Stack->get_stack() #5 /srv/users/testars in /srv/users/testars/apps/testars/public/wp-content/themes/hello-elementor/includes/settings/settings-header.php on line 87