You attempted to statically export your application via output: 'export' or next export, however, one or more of your pages uses getServerSideProps.

It is not possible to use getServerSideProps without a server, so you'll need to use next start when self hosting or deploy to a provider like Vercel.

1. If you'd like to keep your application static, you can use getStaticProps instead of getServerSideProps.

2. If you want to use server-side rendering, update your build command and remove output: 'export' and remove next export. For example, in your package.json:

   --- a/package.json
   +++ b/package.json
   @@ -1,7 +1,7 @@
   {
     "scripts": {
       "dev": "next dev",
   -    "build": "next build && next export",
   +    "build": "next build",
       "start": "next start"
     }
   }

   --- a/next.config.js
   +++ b/next.config.js
   @@ -1,4 +1,4 @@
   {
     module.exports = {
       reactStrictMode: true,
   -    output: "export",
     }
   }

Note: Removing export does not mean your entire application is no longer static. Pages that use getStaticProps or no lifecycle will still be static!

• Automatic Static Optimization
• getStaticProps documentation
• exportPathMap documentation