How to return the "Sing Up" tab to the auth0 gateway form

I was invited to the project as a developer to make registration and authorization by auth0 on the WordPress customer site on the front end.
For connecting WordPress to auth0 I use the “Login by Auth0” plugin.
I get a problem with the auth0 gateway because I can’t get the registration tab for binding with front-end input fields.
For calling the auth0 interface I use the Web application with a connected database with automatically imported users’ credentials.
I tried to find any additional setting which can change displaying of the auth0 gateway, but not found it (“Disable Sign Ups”, in db settings is disabled).
Help me please for finding a problem, or give a solution for the return displaying the “Sing Up” tab on the auth0 gateway page if possible.
Thanks in advance for your reply.