With the v2.6 update you must now add an Armadillo Blog stack to your RapidWeaver project file, in order to display a blog created in Armadillo.
Prior to v2.6, the main Armadillo stack could display a Blog for you, but this is no longer the case.
If you have already added an Armadillo Blog stack to the page in RapidWeaver, and content is still not appearing, be sure you do not have the main Armadillo stack on the same page. This particular combination of stacks will prevent content from appearing on the page.
As such, move the main Armadillo stack to a different page in your project, and republish.