Fatal error: Uncaught Error: Call to undefined function add_action() in C:\xampp\htdocs\wp-content\plugins\wp-timelines\shortcode\timeline-infographics.php:6 Stack trace: #0 C:\xampp\htdocs\wp-content\plugins\wp-timelines\shortcode\timeline-infographics.php(584): WPTL_Timeline_Infographics->__construct() #1 {main} thrown in C:\xampp\htdocs\wp-content\plugins\wp-timelines\shortcode\timeline-infographics.php on line 6