Symptoms:
On entering a license key in Configuration Manager's licensing page, a similar error is recieved.
Cause:
Configuration Manager for JIRA can be used either with a license issued by Atlassian or a license issued by Botron Software. CMJ's licensing page can only be used for licenses, issued by Botron Software.
Resolution:
Enter the Atlassian issued license n the Manage add-ons page like any standard JIRA add-on. More details about CMJ's licensing model can be found here: https://botronsoft.atlassian.net/wiki/spaces/CMJ/pages/51609606/Licensing