After logining by Google and creating a new HamCQ account, there're some problems about the Change Password button on the Settings page.
The problem is that if you click the Change Password button then there's a alert showing like the image below, but no challenge showing.


And my email received no new mails from HamCQ.
This might be the question about the display of the Turnstile Challenge.
But one interesting thing is you could log out and try to Forgot Password in the login frame.
Btw because of the third party login, i did not set the password so that i could not change the email so that i have to reset the password. This is why i found the problem.