Error using themes

I just switched got the fauna theme and it was working fine until I decided to switch from right sidebar to left under the theme options. Now i get Catchable fatal error: Object of class ThemeToolkit could not be converted to string in /mounted-storage/home54c/sub008/sc36331-DWXN/www/wp-content/themes/fauna/themetoolkit.php on line 112 whenever i try to access the site or the theme options page or my blog. It works fine with the default theme. I’ve tried to delete the theme, and put it back on and it still doesn’t work. Please help me ^_^