Fatal error: Uncaught Error: Undefined class constant 'ALERT' in /home/bworks/www/kukan-keikaku/wp-content/plugins/the-post-grid/app/Widgets/elementor/rtTPGElementorHelper.php:61 Stack trace: #0 /home/bworks/www/kukan-keikaku/wp-content/plugins/the-post-grid/app/Widgets/elementor/widgets/list-layout.php(68): rtTPGElementorHelper::query(Object(TPGListLayout)) #1 /home/bworks/www/kukan-keikaku/wp-content/plugins/elementor/includes/base/controls-stack.php(2329): TPGListLayout->register_controls() #2 /home/bworks/www/kukan-keikaku/wp-content/plugins/elementor/includes/base/controls-stack.php(496): Elementor\Controls_Stack->init_controls() #3 /home/bworks/www/kukan-keikaku/wp-content/plugins/elementor/includes/base/widget-base.php(177): Elementor\Controls_Stack->get_stack() #4 /home/bworks/www/kukan-keikaku/wp-content/plugins/elementor/includes/base/controls-stack.php(300): Elementor\Widget_Base->get_stack() #5 /home/bworks/www/kukan-keikaku/wp-content/plugins/elementor/includes/base/controls-stack.php(2416): Elementor\Control in /home/bworks/www/kukan-keikaku/wp-content/plugins/the-post-grid/app/Widgets/elementor/rtTPGElementorHelper.php on line 61