My blog template I created as the main shop on my multisite installation is no longer showing up

Hi, I installed multisite and the blog template plugin. I have marketpress plugin and prosite. I gave myself prosite level for my storefront. Everything was working fine. I went to check today and it is no longer there. All I have is this error message on the blog i created http://www.shopatcrochetartdesign.com:

Cart:

Fatal error: Call to undefined function mp_items_count_in_cart() in /home3/inger/public_html/wp-content/themes/gridmarket/header.php on line 27

Do I have to do something in the cpanel or is this something that can get fixed in the dashboard?

Please help me :slight_smile:

Regards, Inger