Fatal error: Uncaught Error: Undefined class constant 'ALERT' in D:\Sites\web_7647047059894113372625490\www\wp-content\plugins\sticky-header-effects-for-elementor\modules\transparent\module.php:50 Stack trace: #0 D:\Sites\web_7647047059894113372625490\www\wp-includes\class-wp-hook.php(326): SheHeader\Modules\Transparent\Module->register_controls(Object(Elementor\Element_Section)) #1 D:\Sites\web_7647047059894113372625490\www\wp-includes\class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #2 D:\Sites\web_7647047059894113372625490\www\wp-includes\plugin.php(517): WP_Hook->do_action(Array) #3 D:\Sites\web_7647047059894113372625490\www\wp-content\plugins\elementor\includes\base\controls-stack.php(1630): do_action('elementor/eleme...', Object(Elementor\Element_Section), Array) #4 D:\Sites\web_7647047059894113372625490\www\wp-content\plugins\elementor\includes\elements\section.php(1330): Elementor\Controls_Stack->end_controls_section() #5 D:\Sites\web_7647047059894113372625490\www\wp-content\plugins\elementor\includes\bas in D:\Sites\web_7647047059894113372625490\www\wp-content\plugins\sticky-header-effects-for-elementor\modules\transparent\module.php on line 50