Hi, I’m getting the error above when trying to authenticate user using password-less method I got the sms code when i hit the “passwordless/start” endpoint, however, I’m unable to authenticate. I am following this document guide https://auth0.com/docs/api/authentication#passwordless https://aut…

I was just going to ask the same problem and then I found this solution. However, I can’t seem to be able to set the grant types for my application. I can open the advanced settings and then tick the otp grant box but when I try to save I get an error: Error! Invalid grant types: http://auth0.com…

nikiben January 25, 2020, 8:09am 7

Yes that works! Choosing the regular web app type made it visible.
Thanks @nicolas_sabena for your help!

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Why can't SPAs use Embedded Passwordless Login?

Passwordless Authentication grant type not allowed for client

Grant type 'http://auth0.com/oauth/grant-type/passwordless/otp' not allowed for the client