req is not available in nuxtServerInit

[PaulBouisset]

When deployed on Vercel the value req is undefined in nuxtServerInit in my store index.js file:

export const actions = {
  async nuxtServerInit ({ state, dispatch, commit }, { req }) {
    console.log(req); // this is undefined on vercel
  }
}

My config:

{
  "version": 2,
  "builds": [
    {
      "src": "nuxt.config.js",
      "use": "@nuxtjs/vercel-builder",
      "config": {
        "serverFiles": ["api/**"],
        "internalServer":true
      }
    }
  ]
}

Is it because of internalServer:true ? Is there a specific option I need to change?