Nuxt.js Internal Server Error when using @nuxtjs/sitemap

Hi, I am using @nuxtjs/sitemap in my project which is working perfectly in dev environment but after deploying to now when I visit mysite.com/sitemap.xml I see Nuxt.js Internal Server Error on the browser and on the Zeit Now Runtime Log I see:

ERROR  Cannot read property 'map' of null

  at joinRoutes (node_modules/@nuxtjs/sitemap/lib/cache.js:76:31)
  at AsyncCache.load [as _load] (node_modules/@nuxtjs/sitemap/lib/cache.js:19:18)

Duration: 7.37 ms  Billed Duration: 100 ms  Memory Size: 3008 MB  Max Memory Used: 238 MB	

I have Googled a lot but couldn’t find any solution to this. Can anyone please help?

[MarvinMiles]

@nuxtjs/sitemap module writes sitemap-routes.json file into nuxt dist directory during build process:

But currently nuxt`s now-builder ignores external files outside ‘client’ and ‘server’ folders. So you have to add path to sitemap-routes.json manually.

@isaumya Just add "./.nuxt/dist/sitemap-routes.json" to serverFiles array in your now.json config file than your issue will be fixed:

"builds": [
    {
      "src": "nuxt.config.js",
      "use": "@nuxtjs/now-builder",
      "config": {
        "serverFiles": [
          "./.nuxt/dist/sitemap-routes.json"
        ]
      }
    }
  ]

In case you use custom buildDir, use "./YOUR_BUILD_DIR/dist/sitemap-routes.json" instead.

[isaumya]

@MarvinMiles Thank you so much for looking into this and providing the solution. I have just now tested and can confirm that the sitemap is running perfectly and not returning any Internal Server Error. Thanks again for the help. 😊