Fatal G2 error

Here's the error from G2: Error (ERROR_PERMISSION_DENIED) : Invalid URL! The requested URL https://digitaldonkey.de/bilder?g2_view=slideshow.Slideshow&g2_itemId=7646&g2_return=http://blog.digitaldonkey.de/v/walkaboutlove/desert&g2_wpg2_returnname=the+digital+donkey&g2_wpg2_lightbox=active&g2_wpg2_lightboxsize=500 tried to insert a redirection to http://blog.digitaldonkey.de/v/walkaboutlove/desert which is not a part of this Gallery.