I updated to the current version of the Colorway theme and now am unable to access the admin area at all for my site. I have not upgraded to the latest version of WordPress yet.

I get the following message instead:

Fatal error: Call to undefined function wp_get_theme() in /home/shercon/public_html/wp-content/themes/colorway/functions/theme-options.php on line 11

My website is http://www.sportsmanslodgecolorado.com

In IE it shows 2 menus, but in Firefox it looks fine.