致命错误：如何解决Elgg中的致命错误

Question

激活izap竞赛插件后，出现以下错误：

Fatal error: Declaration of IzapChallenge::save() must be compatible with IzapObject::save($validate = true, $options = Array) in /var/www/html/rohit/Elgg/elgg/mod/izap-contest/classes/IzapChallenge.php on line 1

如何解决？