I was getting the same error. Now after deleting and reinstalling NextGen Gallery I can’t get it to run at all. It just shows this error now:
/home/content/d/s/w/dswebb/html/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/nextgen_basic_album/nextgen_basic_album_gallery_display_type.php is not a valid MVC template
@richardwilding – Are you seeing anything in your server error_log files? Have you tried checking for plugin conflicts?
@dswebb – You will most likely need our external Reset Tool plugin based on that error message. Please send us a Bug Report (http://www.nextgen-gallery.com/report-bug/) and ask us for the plugin.
Thanks!
– Cais.