Fixing a blank page bug

Hi Charlie,
I was having a blank page on the wp-admin pages when I updated the plugin from 1.2 to 2.0-RC1, after setting WP_DEBUG  to
i was having "Fatal error: Call to undefined function get_current_screen() in/cinema/wp-content/plugins/wpmovielibrary-master/includes/classes/class-wpmoly-utils.php on line 921". So i added this line and it fixed the issue.
Thank you for this great update.