I had some problems signing up, every attempt was getting refused, i think maybe because i went onto the sign up page some hours prior to actually attempting to sign up, used my phone for other stuff and then returned to the sign up page?(Sorry I forget the error message I was getting) Got around this by leaving the signup page and navigating to it again.
Also found that going into my password manager and returning to the page reset the page. Just wanted to sign up quick without risking more friction.