nuxt2 deploy to vercel error: Error: Please install npm before continuing.

[jackyyangtw]

When I was deploying a Nuxt2 project to Vercel, I encountered an error: 'Error: Please install npm before continuing.' How should I resolve this? Thanks!

vercel.json
{
"builds": [
{
"src": "nuxt.config.js",
"use": "@nuxtjs/vercel-builder",
"config": {}
}
]
}

package.json
{
"name": "nuxt-course",
"version": "1.0.0",
"description": "Nuxt.js course for Udemy",
"author": "Maximilian Schwarzmüller",
"private": true,
"scripts": {
"dev": "nuxt",
"build": "nuxt build",
"start": "nuxt start",
"generate": "nuxt generate",
"heroku-postbuild": "npm run build"
},
"dependencies": {
"@nuxtjs/axios": "^5.13.6",
"@nuxtjs/vercel-builder": "^0.21.0",
"@nuxtjs/vuetify": "^1.12.3",
"axios": "^0.26.1",
"body-parser": "^1.20.0",
"cross-env": "^5.0.1",
"express": "^4.18.1",
"firebase": "^8.10.1",
"js-cookie": "^3.0.1",
"node-fetch-native": "^1.2.0",
"nuxt": "^2.15.7",
"quill": "^1.3.7",
"vue-quill-editor": "^3.0.6"
},
"devDependencies": {
"@nuxt/image": "^0.7.1",
"autoprefixer": "^10.4.14",
"postcss": "^8.4.24",
"tailwindcss": "^3.3.2"
}
}

vercel backend error:

[ayoub9360]

Hello ! I have the same error here, did you found any way to fix it ?