If you do not recieve your confirmation email within a few hours, please email haloutau@gmail.com with your username for manual validation. Your account should be activated within 24 hours.
You may also reach out via any other listed contact on Admin Halo's about page: https://utaforum.net/members/halo.194/#about
(I know this is not an amazing first thread but...) I tried to integrate my account here with my google acc (to have everything set up and sorted) and got this error message, even after retrying a couple times.