Fatal error: Uncaught Error: Call to undefined function plugin_dir_path() in /home/handllu1/public_html/redboys/plugins/simple-membership/lib/paypal/class-swpm-paypal-button-sub-ajax-handler.php:7 Stack trace: #0 {main} thrown in /home/handllu1/public_html/redboys/plugins/simple-membership/lib/paypal/class-swpm-paypal-button-sub-ajax-handler.php on line 7