Version 4.1 Error in onCallback of lib/auth0.ts not work

[NguyenCao-Glams]

Checklist

• The issue can be reproduced in the nextjs-auth0 sample app (or N/A).
• I have looked into the Readme, Examples, and FAQ and have not found a suitable solution or answer.
• I have looked into the API documentation and have not found a suitable solution or answer.
• I have searched the issues and have not found a suitable solution or answer.
• I have searched the Auth0 Community forums and have not found a suitable solution or answer.
• I agree to the terms within the Auth0 Code of Conduct.

Description

I try to process error when initialize auth0, but the an error is show instead of redirect to error page

Reproduction

In file lib/auth0.ts, add

import { Auth0Client } from '@auth0/nextjs-auth0/server'
import { NextResponse } from 'next/server'

export const auth0 = new Auth0Client({
  authorizationParameters: {
    audience: process.env.AUTH0_AUDIENCE,
    scope: 'asd'
  },

  async onCallback(error, context, session) {
    // redirect the user to a custom error page
    if (error) {
      return NextResponse.redirect(
        new URL(`/error?error=${error.message}`, process.env.APP_BASE_URL)
      )
    }

    // complete the redirect to the provided returnTo URL
    return NextResponse.redirect(
      new URL(context.returnTo || '/', process.env.APP_BASE_URL)
    )
  }
})

It will not redirect to error page, but show an error window

Additional context

No response

nextjs-auth0 version

4.1

Next.js version

15.1.7

Node.js version

22.14.0