BuddyPress.org

thank you. But then I get this error:

Fatal error: Uncaught ArgumentCountError: Too few arguments to function function_voornaam(), 1 passed in E:\Xampp\htdocs\wordpress\wp-includes\class-wp-hook.php on line 303 and exactly 2 expected in E:\Xampp\htdocs\wordpress\wp-content\themes\buddyboss-theme-child\functions.php:48 Stack trace: #0 E:\Xampp\htdocs\wordpress\wp-includes\class-wp-hook.php(303): function_voornaam('show_messagge') #1 E:\Xampp\htdocs\wordpress\wp-includes\plugin.php(189): WP_Hook->apply_filters('show_messagge', Array) #2 E:\Xampp\htdocs\wordpress\wp-content\themes\buddyboss-theme-child\functions.php(66): apply_filters('bp_members_sign...', 'show_messagge') #3 E:\Xampp\htdocs\wordpress\wp-settings.php(546): include('E:\\Xampp\\htdocs...') #4 E:\Xampp\htdocs\wordpress\wp-config.php(97): require_once('E:\\Xampp\\htdocs...') #5 E:\Xampp\htdocs\wordpress\wp-load.php(50): require_once('E:\\Xampp\\htdocs...') #6 E:\Xampp\htdocs\wordpress\wp-blog-header.php(13): require_once('E:\\Xampp\\htdocs...') #7 E:\Xampp\htdocs\wordpress\index.php(17): require('E:\\Xampp\\htdocs...') #8 {main} thrown in E:\Xampp\htdocs\wordpress\wp-content\themes\buddyboss-theme-child\functions.php on line 48