Error: The default export is not found in page in Next.js: Causes and How to Fix

Ensure Default Export

• Verify that your Next.js page component is exported as a default export. Each file in the **pages** directory should export a React component as the default export.

// Correct Default Export Example
function Home() {
  return <div>Welcome to Next.js!</div>;
}

export default Home;

Correct Export Syntax

• Check for syntax errors or missing keywords. Ensure you are not using **module.exports** syntax, which is common in Node.js but incorrect in Next.js for exporting React components.

// Incorrect
module.exports = Home;

// Correct
export default Home;

Ensure File Placement

• Files that represent pages must be placed directly within the **pages** directory or its subdirectories, not nested inside other folders like **components** or **lib**.

# Correct Structure
/pages
  /about.js
  /contact.js

# Incorrect Structure
/pages/components/about.js

Dynamic Routes and Default Exports

• In case of dynamic routes, ensure that the required file exports a default component. Dynamic files should follow the square-bracket naming convention (e.g., **[id].js**).

// pages/[id].js
function Post({ id }) {
  return <div>Post ID: {id}</div>;
}

export default Post;

Check for Reserved Names

• Avoid using filenames that conflict with reserved names or special files in **Next.js**, such as **_app.js or _document.js**, unless intending to customize these special files.

Dependencies and Version Conflicts

• If you've recently upgraded Next.js or any related dependencies, consider potential breaking changes that might introduce export issues. Revert to an older version or check migration guides if necessary.

# Check for breaking changes
npm outdated

Handle External Components

• If your page component relies on components from external libraries, ensure those components are properly imported and that your **node\_modules** are not corrupted. Reinstall if necessary.

# Reinstall node modules
rm -rf node_modules
npm install

Debugging and Logging

• Utilize console logs or debugger statements to trace the component and ensure it is being rendered correctly.

// Add console log
function Home() {
  console.log("Home component rendered");
  return <div>Welcome to Next.js!</div>;
}

Check for Compilation Errors

• Run **npm run dev** to ensure no compilation errors might disrupt the default export process.

# Run development server and watch for errors
npm run dev