Symptoms

The following ERROR is seen in the footer of Confluence when the license has been confirmed as a valid license: 

Cause

This is caused by customization of the footer-content.vm Velocity template. Most of the time, the customisation applied in this file is carried from the previous Confluence release customisation which is not a recommended for vm file. As there might be some changes for Confluence styling and classes use, it would be better to use the new default file as the baseline of the customisation.

Resolution

Please replace the <confluence_installation_folder>/confluence/decorators/includes/footer-content.vm file with the default Velocity file that came with the Confluence version that you have.