How to Fix the UNABLE_TO_VERIFY_LEAF_SIGNATURE Error in Node.js with Nodemon?

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Understanding the UNABLE_TO_VERIFY_LEAF_SIGNATURE Error

Why Does It Happen?

A few common reasons behind this error include:

Issues with SSL Configuration: Sometimes, the SSL configuration on your local machine or network settings interferes with proper verification.

Missing Root Certificate: Absence of a necessary root certificate in the certificate chain can lead to verification problems.

How to Fix It?

Here are some solutions you can try to resolve the UNABLE_TO_VERIFY_LEAF_SIGNATURE error:

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Adjust npm Configuration

You can configure npm to ignore SSL certificate errors. Although this is not recommended for production environments, it might be acceptable for quick local fixes.

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Add Missing Certificates Manually

In some cases, adding missing root certificates manually can solve the issue. Here’s a general approach:

Download the missing certificates.

Add the certificates paths to the NODE_EXTRA_CA_CERTS environment variable.

Use a VPN or Different Network

Sometimes, your local network settings or firewalls might be the culprit. Switching to a different network or using a VPN can sometimes circumvent these issues.

Set Up Proxy Configuration (if needed)

If you are behind a corporate proxy, you may need to configure npm to work with your proxy. Set the https-proxy and proxy configurations as required:

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Conclusion