I’m frustrated

WP Plugin: Settings will not save, getting blank screen after clicking save button

I am unable to save any new settings in the Fotomoto WP plugin. We installed the plugin before the 3.9 update, the site is now at WP 3.9.1, using Photocrati theme 4.7.3. When I go to save the new page settings, I get a blank screen at this url: /wp-admin/options-general.php?page=fotomoto#pages_div
Any advice?
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