[Plugin: Google Doc Embedder] Type of document not supported for ppt?

As per the plugin documentation, this plugin doesn’t really work well with files stored on Google Docs itself. This is because there are multiple link types based on sharing permissions and the like, and even public documents stored there often require Google account login to access. While some have gotten it to work, it is sporadic at best and there is no known way to make it work every time.

Please consider storing the file locally on your server (or in another publicly accessible location) and trying the plugin again from there.