Had the same issue, but fixed it by clicking on 'forgot password', entering my email and using the new password to login. However, the security seems questionable - it did not verify/notify my email id, and presents my password in plaintext on the website itself.

Just tried it and it works for me

Having the same issue

I found my issue. I used to put gibberish into the email field and worked previously. The new account I made in the OP also had a gibberish email. My new account is a valid email and can log in.