Software⏱️ 3 min read📅 2026-06-19

How to Fix: Perl LWP: running a script returns an error

Error fixing LWP protocol issue with HTTPS.

Quick Answer: Install the LWP::Protocol::https module to support HTTPS protocol.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. ✅ Best Solutions to Fix It
  3. ✨ Wrapping Up

The error '501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed)' occurs when trying to access a website using HTTPS protocol with an LWP UserAgent, but the required LWP::Protocol::https module is not installed. This issue affects users who have installed Bundle::LWP and are running Perl scripts that use LWP.

This error can be frustrating for developers and users who rely on LWP for web scraping or automation tasks. However, with the right steps, you can easily fix this issue and get back to working with your Perl script.

💡 Why You Are Getting This Error

  • The primary reason for this error is that the LWP::Protocol::https module is not installed. This module provides support for HTTPS protocol in LWP UserAgent.
  • An alternative reason could be that the Bundle::LWP module is not properly configured or loaded, which might cause the LWP::Protocol::https module to not be available.

✅ Best Solutions to Fix It

Installing the required LWP::Protocol::https module

  1. Step 1: Open a terminal or command prompt and run the following command: cpan LWP::Protocol::https This will install the required module.
  2. Step 2: Once installed, try running your Perl script again to see if the issue is resolved.
  3. Step 3: If you encounter any issues during installation, make sure to check the LWP documentation for further troubleshooting steps.

Configuring Bundle::LWP to use HTTPS protocol

  1. Step 1: Open your Perl script and add the following line at the beginning of the script: use LWP::Protocol::https This will configure the Bundle::LWP module to use the HTTPS protocol.
  2. Step 2: Make sure that you have installed the required LWP::Protocol::https module before adding this line to your script.
  3. Step 3: If you are using a version control system, make sure to commit and push the changes to ensure they are available for future development.

✨ Wrapping Up

To fix the error '501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed)', you can either install the required LWP::Protocol::https module or configure Bundle::LWP to use HTTPS protocol. Follow the steps outlined in this guide, and you should be able to resolve the issue and continue working with your Perl script.

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