Fatal error: Uncaught Error: Call to undefined method IETEF_Platform::external_id() in /code/wp-content/plugins/ietef-campus/includes/class-ietef-platform.php:690 Stack trace: #0 /code/wp-includes/shortcodes.php(434): IETEF_Platform->shortcode_payment_success() #1 [internal function]: do_shortcode_tag() #2 /code/wp-includes/shortcodes.php(273): preg_replace_callback() #3 /code/wp-includes/class-wp-hook.php(353): do_shortcode() #4 /code/wp-includes/plugin.php(206): WP_Hook->apply_filters() #5 /code/wp-content/plugins/ietef-campus/includes/class-ietef-platform.php(347): apply_filters() #6 /code/wp-content/plugins/ietef-campus/templates/site-shell.php(15): IETEF_Platform->render_shell_content() #7 /code/wp-includes/template-loader.php(132): include('...') #8 /code/wp-blog-header.php(19): require_once('...') #9 /code/index.php(17): require('...') #10 {main} thrown in /code/wp-content/plugins/ietef-campus/includes/class-ietef-platform.php on line 690