Fatal error: Uncaught TypeError: Argument 1 passed to Library\Utils::validateUsername() must be of the type string, null given, called in /var/www/v4.coachesconsole.com/app/web/Register.php on line 247 and defined in /var/www/v4.coachesconsole.com/library/utils.php:1609 Stack trace: #0 /var/www/v4.coachesconsole.com/app/web/Register.php(247): Library\Utils::validateUsername() #1 /var/www/v4.coachesconsole.com/app/web/Register.php(134): App\Web\Register->validateUser() #2 /var/www/v4.coachesconsole.com/app/web/Register.php(433): App\Web\Register->register() #3 /var/www/v4.coachesconsole.com/app/web/Web.php(1849): App\Web\Register->callMethod() #4 /var/www/v4.coachesconsole.com/system/core/UrlParser.php(109): App\Web\Web->register() #5 /var/www/v4.coachesconsole.com/index.php(155): System\Core\UrlParser->run() #6 {main} thrown in /var/www/v4.coachesconsole.com/library/utils.php on line 1609