The error message says: "You can't make this change at the moment. This is because we noticed you are using a device you don't usually use and we need to keep your account safe. We'll allow you to make this change after you've used this device for a while." This is from my main laptop that I do all of my work on, including all Facebook interactions, so that makes no sense. I've been following the links/steps for a few weeks now and I'm almost at my deadline (2 days away).
I'd appreciate any help!