Bad request when signing-up a new account

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,
1

Hi
I have create a GitHub project here.

  • A login page is displayed when I first accessed http://localhost:4040/dashboard.
  • Select sign-up and enter an emaila address and password then click continue.
    an error is shown “Something went wrong, please try again later” and there is a 400 bad request shown in the browser console
POST https://xxxxx.au.auth0.com/u/signup?state=hKFo2SBkS1FJ...15SERiSEd5WjFHZ004M3JmNFU 400 (Bad Request)

Do you know what am I missing here?