Code Macro Plugin gives message about not designed for Data Centre

Summary

In Confluence 6.1.2 Data Centre, the Code Macro Plugin displays a message

However it works correctly.

Steps to reproduce

1. Install and start Confluence DataCentre 6.1.2
2. Go to > Add-ons
3. Search for All Add-Ons
4. Enter Code Macro Plugin in the filter
5. Open the Add-On
6. See the message

   This add-on is not designed for Data Center versions of Confluence. Request an update from the vendor.

Expected Results

It does not display the message

Actual results

The message is displayed

Workaround

Testing indicates this is likely to be an error with Atlassian Marketplace as the Code Macro works as expected.