I have seen several posts on linking Trailhead badges to your Success Community Profile so the badges display.
I'm in the right place, and, enter in my email address.  My email address is the same for all my accounts (WebAssessor, Trailhead, Success Community).

I keep getting an error message that it can't generate the email to me.  I have no idea why.  And, YES, I'm using the right email address.  Can someone help?
See screen shot.