Fatal error: Uncaught Error: Class 'SiteOrigin_Widget' not found in C:\xampp\htdocs\wp-content\plugins\wp-timelines\inc\siteorigin\widgets\timelines-hozizontal-multi\timelines-hozizonal-multi.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\wp-timelines\inc\siteorigin\widgets\timelines-hozizontal-multi\timelines-hozizonal-multi.php on line 9