Fatal error: Uncaught Error: Call to undefined function add_action() in C:\Program Files\Apache Group\Apache2\htdocs\stone-quarries\wordpress\wp-includes\ms-default-filters.php:16 Stack trace: #0 {main} thrown in C:\Program Files\Apache Group\Apache2\htdocs\stone-quarries\wordpress\wp-includes\ms-default-filters.php on line 16