Hi there,
This is strange, I never got this error message before. When I try to log in with the e-mail address I used for registration (the one and only e-mail address connected to this account), I got this error message when trying to log in with my Google account.
I found one similar issue in the Community but the topic was closed without a resolution. Somebody has a clue?
Hello @Janos
Please make sure that you fill out the Email and Password fields in the Make login page.
Based on the error you’re seeing, it looks like you were trying to sign in using SSO (likely Google SSO), but your Make account isn’t configured for it.
Could you please try and let us know is this did the trick for you? 
Thank you Michaela, when I tried to login this way yesterday, I got an error message, that the email or password is not good, but today I managed to login with the same credentials. I don’t understand, but happy that it works, thanks for your reply!
