Call to undefined function error on Q&A


I am trying to set up Q&A Plugin and as I go to /questions/ask or if I try to answer to any question, I receive this error:

Fatal error: Call to undefined function ot_get_media_post_ID() in /home/mydomain/public_html/wp/wp-content/themes/sevenmag/admin/ot-loader.php on line 613

I have attempted removing it as I read in another post, but I did get another error, plus the theme works properly everywhere else so I am not really sure I should remove pieces of code.