The Table Plugin is rendering error message despite valid license

The Table Plugin plugin for Confluence is no longer working for OnDemand customers. It's only rendering an error message.

Problem
For all tables, where customers use this plugin, they get following error text instead of the table

Error rendering macro 'table-plus' : Notify your Confluence administrator that "Bob Swift Software - Table Plugin" requires a valid license. Reason: No license found for plugin with key: org.swift.confluence.table.

Even if the subscription has been added in https://my.atlassian.com and the add-on has been enabled in OnDemand, the macros still do not work.