"Password can't be blank" after Google login setup

Hey gang. Tonight I tried my hand at turning up Google OAuth to my site. I followed the instructions here, however when attempting to login to the site, it is telling me that the password cannot be blank. Weird, as I can authenticate against Google when it asks me (Discourse pops a window for accounts.google.com).

As you can see from the screenshot, Google accepts the creds, but still wants a password. Any ideas?

Hrmm, I must be missing something on the Discourse side, as I am getting the same results with Facebook Auth.

You might double and triple check that you followed the instructions precisely.

기본 oauth2 플러그인에서도 동일한 오류가 발생합니다. 안내에 따라 여러 번 시도해 보았지만, 아무런 도움이 되지 않았습니다. 이 문제를 어떻게 해결하셨나요? 아니면 다른 분이 이 문제를 해결하는 방법을 아시는 분이 계신가요? 감사합니다!