Call to undefined function is_site_admin()

I was seeing the error message " Call to undefined function is_site_admin() " when browsing the admin panel pages for this module. I discovered that the function in question is out of date and needs to be updated to is_super_admin(). See the code below to find and replace the lines causing this error message.

Find the line:

if ( get_site_option('members_directory_page_setup') != 'complete' && is_site_admin() ) {

Replace with:

if ( get_site_option('members_directory_page_setup') != 'complete' && is_super_admin() ) {

EDIT: Whoops. I reported this for the wrong plugin. This code is related to the members-directory.php file.