Fatal Error in BuddyPress Business Activation

After activating the BuddyPress Business theme, I receive the following error in the footer section

Fatal error: Call to undefined function: bp_is_member() in /homepages/26/d309411836/htdocs/TRADE/wp-content/themes/bp-business/footer.php

I've installed other themes you've produced and haven't had this experience. Please advise.