Error Message: Theme and WooCommerce Trouble

I updated my theme and installed the WooCommerce plugin. After doing so I have received this message:

Fatal error: Call to undefined function request_filesystem_credentials() in /home/content/78/11601778/html/wp-content/plugins/wp-e-commerce-dynamic-gallery/admin/less/sass.php on line 45

I can’t login to my dashboard, or at least don’t know how to get to it to fix.

Any help would be greatly appreciated!