Instructable emails no longer open in gmail.

One or two months ago, I stopped being able to open Instructables email links. It used to go directly to an HTTP:// address, now it goes to http://a...

One or two months ago, I stopped being able to open Instructables email links. It used to go directly to an HTTP:// address, now it goes to "http://api.facebook.com . . . . ." and the page simply says "NOT FOUND" Evidently it's going through facebook (which I have open and logged in) I can't even unsubscribe because it goes through that same address. Any Idea how to fix?