I updated the next version to 14 and I tried to display the output in help folder. But I received the below error when running the npm build “Unable to find build-manifest. Make sure to build the project using next build command”.

The next.config.js is provided below:

const withMarkdoc = require('@markdoc/next.js');
module.exports = withMarkdoc()({
  trailingSlash: true,
  distDir:'help',
  pageExtensions: ['js', 'md', 'mdoc'],
  images: {
    unoptimized: true,
  },
});

The next-sitemap.config.js is provided below:

module.exports = {
  siteUrl: 'https://help.com/',
  output: 'help',
  sourceDir:'help',
  additionalPaths: async (config) => {
    return [{ loc: 'https://help.com/sdk/dotnet/class-reference/Help.Api.html',
              changefreq: 'daily',
              priority: 0.7,
              lastmod: new Date().toISOString(),}]
  },
  generateIndexSitemap:false,
}

The package.json file is provided below:

{
  "name": "help-doc-builder",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "postbuild": "next-sitemap",
    "start": "next start",
    "lint": "next lint",
    "deploy": "gulp deploy"
  },
  "dependencies": {
    "@markdoc/markdoc": "^0.1.12",
    "@markdoc/next.js": "^0.1.8",
    "aws-cloudfront-invalidate": "^0.1.3",
    "concurrent-transform": "^1.0.0",
    "express": "^4.18.2",
    "fs": "^0.0.1-security",
    "gulp": "^4.0.2",
    "gulp-awspublish": "^4.0.0",
    "gulp-awspublish-router": "0.2.0",
    "gulp-cloudfront-invalidate-aws-publish": "^1.0.0",
    "gulp-rename": "^1.4.0",
    "helmet": "^7.0.0",
    "next": "^14.2.3",
    "next-sitemap": "^4.2.3",
    "prism-json-fold": "^1.0.1",
    "prismjs": "^1.29.0",
    "react": "18.2.0",
    "react-copy-to-clipboard": "^5.1.0",
    "react-dom": "18.2.0",
    "shelljs": "^0.8.3"
  },
  "devDependencies": {
    "eslint": "8.24.0",
    "eslint-config-next": "12.3.1"
  }
}