If you're seeing a dark gray screen when trying to sign in to Facebook using the AOL Shield Pro browser, it's caused by a bug in Chromium, the framework that AOL Shield Pro is built on (as well as Chrome).
Facebook is trying to display a pop-up notification, which is causing an error in Chromium. Chromium is working on fixing this problem, but in the meantime, we have a workaround that should solve this issue for you.
To fix the issue:
1. Since this is an issue with a Facebook pop-up notification and Chromium, please close the AOL Shield Pro browser and sign in to Facebook using a browser other than AOL Shield Pro or Chrome (like Firefox, IE, or Edge).
2. When you get the pop-up notification asking would you be willing to accept all Facebook notifications, click "No."
That should do the trick. Close the browser and re-launch AOL Shield Pro. Now you should be able to sign in to Facebook.