quiz on my Opigno???

Hello, Im trying to add a quiz on my Opigno and i'm having this: Fatal error: Call to undefined function _quiz_question_get_implementations() in /home2/adminiu5/public_html/sites/all/modules/opigno/modules/simple_ui/opigno_simple_ui.module on line 112 Even trying to edit or add new content on the site can't work with. I went through many resources like Covoco Pricing but did not find about this. I will be greatful if you point me in the right direction. Any help wll be appreciated. Thank you