Fatal error: Uncaught Error: Call to undefined function add_action() in C:\xampp\htdocs\wordpress\wp-content\plugins\glue-for-yoast-seo-amp\yoastseo-amp.php:60 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wordpress\wp-content\plugins\glue-for-yoast-seo-amp\yoastseo-amp.php on line 60