How to fix email_provider_disabled: Email signups are disabled in Supabase

Log into your Supabase project dashboard and access the Authentication settings:

1. Open your project at https://app.supabase.com
2. Select your project from the list
3. Click on "Authentication" in the left sidebar
4. Navigate to "Providers" tab

This is where all authentication providers are managed, including email/password authentication.

In the Providers section, locate and enable email authentication:

1. Find "Email" in the list of authentication providers
2. Toggle the switch to "Enabled" (it should turn green)
3. Ensure "Confirm email" is configured according to your needs
4. Click "Save" to apply changes

The email provider should now show as active in your dashboard.

Verify that new user registration is allowed:

1. Go to Authentication → Settings
2. Scroll to "User Signups" section
3. Ensure "Allow new users to sign up" is enabled
4. Save your changes

This setting controls whether new registrations are accepted, even if the email provider is enabled.

Verify that email signups now work correctly:

const { data, error } = await supabase.auth.signUp({
  email: '[email protected]',
  password: 'secure-password-123'
});

if (error) {
  console.error('Signup failed:', error.message);
} else {
  console.log('Signup successful:', data.user);
}

The signup should complete without the email_provider_disabled error.