I'm using NGC 1.4.58 over WP 3.6.1 single-site.
I followed the setup instructions to the letter, and successfully configured NFC and NTC; also deactivated the needed options in Better WP Security. Those two work fine, but NGC keeps showing me a blank page with no error message after making me log into Google and asking for my authorization for the custom app.
What am I doing wrong? Any suggestions?