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Licensing Invalid Key Errors

Problem

While working with the Software Licensing addon module, you see the following error:

Invalid Key

Cause

This error indicates that the licensing check code is not passing a license key back to the Software Licensing addon module.

Solution

Check the code to ensure that it is returning the full license key to WHMCS.

troubleshooting troubleshooting-article addon-modules software-licensing-addon

Last modified: 2025 July 28