I too have this message after receiving the warning that the old AU post plugin is deprecated, and that I should now be using the new V2 version. I noticed the original poster of this thread mentions API's although I cannot find any reference to API's in the documentation. It may be useful, for example to tell people how we can use the plugin, not just assume that everyone will know. If this plugin requires API's to make it work, either include these in the hikashop, or tell us how we go about getting the API to use the plugin.