I have just downloaded the plugin and have added a gallery.

When I visit the gallery (http://www.hutchisonhaines.co.uk/galleries/gig-green-2012/) I see this error message in the breadcrumbs

Catchable fatal error: Object of class WP_Error could not be converted to string in /home/content/41/8803641/html/wp-content/themes/FactoryWP/functions.php on line 2632

What I find strange is that both the Secure Images (http://www.hutchisonhaines.co.uk/secure-images/) and Image Store (http://www.hutchisonhaines.co.uk/image-store/) pages both work.

What is causing this error and how can I fix it?

http://wordpress.org/extend/plugins/image-store/