Similar issues with the email confirmation system have been reported in the past. I'm not a developer for this site nor its software, so I'm not in a position to address the precise issue you've experienced here.
However, one option that has worked for others before is re-sending the link through the page linked here. If you've already tried this, or you try it and it fails, let us know.
As the cliche goes, make sure to check your junk mail as well, as your inbox may have sent the message there inadvertently.