3rd party authentication providers update their log-in process regularly. As a result, your Google / Facebook sign-in might not work for a short period of time when they initiate an update (In rare cases, it could last a few days, if they require the resubmission to be reviewed).
But don't worry, you can still log into Papaly using your emails. Please try the following:
1. Go to log-in page and click "Forgot password?"
2. Submit your Gmail / Facebook account address and request a password reset instruction.
3. Follow the link and reset the password. You will be signed in automatically.
4. In the future, you will be able to use your email/password combination to log in, besides Google / Facebook Auth.