Fatal error: Uncaught Error: Call to undefined function add_action() in C:\xampp\htdocs\wp-content\plugins\members\addons\members-role-hierarchy\admin\class-edit-role.php:59 Stack trace: #0 C:\xampp\htdocs\wp-content\plugins\members\addons\members-role-hierarchy\admin\class-edit-role.php(34): MRH_Edit_Role->setup_actions() #1 C:\xampp\htdocs\wp-content\plugins\members\addons\members-role-hierarchy\admin\class-edit-role.php(162): MRH_Edit_Role::get_instance() #2 {main} thrown in C:\xampp\htdocs\wp-content\plugins\members\addons\members-role-hierarchy\admin\class-edit-role.php on line 59