WCF::handleException() Unhandled exception: Call to a member function getAvatar() on null

#0 /var/www/web575/html/wcf/lib/system/template/TemplateEngine.class.php(323): include()
#1 /var/www/web575/html/wcf/lib/page/AbstractPage.class.php(305): wcf\system\template\TemplateEngine->display('gamezoneIndex', 'gamezone')
#2 /var/www/web575/html/wcf/lib/page/AbstractPage.class.php(100): wcf\page\AbstractPage->show()
#3 /var/www/web575/html/wcf/lib/system/request/Request.class.php(58): wcf\page\AbstractPage->__run()
#4 /var/www/web575/html/wcf/lib/system/request/RequestHandler.class.php(139): wcf\system\request\Request->execute()
#5 /var/www/web575/html/gamezone/index.php(3): wcf\system\request\RequestHandler->handle('gamezone')
#6 {main}