The primary reason for this error is that the 'start' script is not defined in the package.json file of your project. This script is used by npm to launch the application.Another possible cause could be if the 'start' script is misspelled or not correctly formatted in the package.json file.

How do I fix: Verify the script name and path?

Step 1: Check that the 'start' script is correctly named and not misspelled. Make sure it matches the command used to launch your application.Step 2: If you are using a custom script location, verify that the path is correct and the script exists at that location.

Software⏱️ 3 min read📅 2026-06-03

How to Fix: Start script missing error when running npm start

Q: How do I fix: 🚀 How to Resolve This Issue Check and update the package.json file?

Step 1: Open your project's package.json file in a text editor.Step 2: Search for the 'scripts' section and ensure that it contains a 'start' script. If not, add it by creating a new key called 'start' with a value containing the command to launch your application (e.g., "node app.js").Step 3: Save

Missing script error when running npm start

Quick Answer: The error indicates that the 'start' script is missing from your package.json file. Check if you have a script defined for the 'start' command and update it accordingly.

📋 Table of Contents

⚠️ Common Causes
🚀 How to Resolve This Issue
💡 Conclusion

When running the npm start command, you encounter an error message indicating that the 'start' script is missing. This issue affects users of Node.js applications who rely on this command to launch their application.

This error can be frustrating for developers as it prevents them from successfully starting their application. However, by following these steps, you should be able to resolve the issue and get your application up and running.

⚠️ Common Causes

The primary reason for this error is that the 'start' script is not defined in the package.json file of your project. This script is used by npm to launch the application.
Another possible cause could be if the 'start' script is misspelled or not correctly formatted in the package.json file.

🚀 How to Resolve This Issue

Check and update the package.json file

Step 1: Open your project's package.json file in a text editor.
Step 2: Search for the 'scripts' section and ensure that it contains a 'start' script. If not, add it by creating a new key called 'start' with a value containing the command to launch your application (e.g., "node app.js").
Step 3: Save the changes to the package.json file.

Verify the script name and path

Step 1: Check that the 'start' script is correctly named and not misspelled. Make sure it matches the command used to launch your application.
Step 2: If you are using a custom script location, verify that the path is correct and the script exists at that location.

💡 Conclusion

By following these steps, you should be able to resolve the 'start' script missing error when running npm start. If you continue to experience issues, consider seeking further assistance from a colleague or online community.

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