There are some types of content ('resources') in Buzzy that have been deprecated - one example is the old 'Embedded link' resource. It was added to a Buzz via the following button:
Old Buzzes containing these 'Embedded Link' resources will continue to render the item perfectly fine in a browser - however, it has been deprecated, and newer versions of the Buzzy app (available in the iOS and Google Play app stores) no longer support this - resulting in the following message on your device:
The fix? Simply use the new 'iFrame' resource, and insert your web content inside the iframe. This will render in all versions of Buzzy, including the new app. For an example, see this article.