@ScruffR: Sorry for my delayed reply. I did read the comments posted by @rickkas7 and took that as a “they know about it / working on it” indication.
But FYI I have NO ad blocker installed. I do however wonder why it’s attempting to transfer data from www.facebook.com when I’m actually only attempting to do stuff with the https://build.particle.io site. I’m puzzled as to why Facebook is even involved in the equation.