Blogs MU 1.2

I upgraded from Blogs MU 1.1 to 1.2 and I am now unable to access my site. I am getting the following error.

Fatal error: Call to undefined function bp_get_root_domain() in /home/admin/domains/successbusinesspro.com/public_html/wp-content/themes/blogs-mu/_inc/functions/options-functions.php on line 347