Hello, I tried to sign up with my own username, email, and password, but the page redirected to the homepage, saying signed out, please sign in again. When I tried to sign up again, it said my username and email were already in use. No welcome email or anything came.
I was able to sign up with another of my Google accounts which I am on now by going through the official Google Sign-Up link. I assume that it's an issue with the regular sign-ups not accepting Gmail addresses. I've had this issue using sign-up forms with Google SSO, but there's a fix/redirect to use that link. I prefer using the site's form because I can pick my own username, etc.
Also, on your about page it says to reach out with any problems, but there's no contact information.