Wordpress Auth0 plugin with additional signup fields

Hi Auth0,
I have a problem with additional signup fields. I put this code into Extra Settings, JSON i valid, but I can’t see those two fields during signup. What I missed during configuration?

{ “additionalSignUpFields”: [ { “name”: “first_name”, “placeholder”: “Please enter your first name” }, { “name”: “last_name”, “placeholder”: “Please enter your last name” } ] }

Could anybody help me?

Kind regards

Really no one? I need to run this with custom signup fields and passwordless. For now I can only log in into WordPress Dashboard.