Fatal error: Uncaught Error: Call to undefined function Members\Admin\add_action() in C:\xampp\htdocs\wp-content\plugins\members\admin\class-meta-box-publish-role.php:41 Stack trace: #0 C:\xampp\htdocs\wp-content\plugins\members\admin\class-meta-box-publish-role.php(163): Members\Admin\Meta_Box_Publish_Role->__construct() #1 C:\xampp\htdocs\wp-content\plugins\members\admin\class-meta-box-publish-role.php(169): Members\Admin\Meta_Box_Publish_Role::get_instance() #2 {main} thrown in C:\xampp\htdocs\wp-content\plugins\members\admin\class-meta-box-publish-role.php on line 41