No Document Import in Page

Why This Error Occurred

next/document was imported in a page outside of pages/_document.js (or pages/_document.tsx if you are using TypeScript). This can cause unexpected issues in your application.

Possible Ways to Fix It

Only import and use next/document within pages/_document.js (or pages/_document.tsx) to override the default Document component:

// pages/_document.js
import Document, { Html, Head, Main, NextScript } from 'next/document'

class MyDocument extends Document {
  //...
}

export default MyDocument

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