The elements folder, as well as it's contents, is missing from the standalone template and the bundle package, but is included in the RocketLauncher package. This folder and it's contents are required for RokNavMenu to work with Gantry.
Just thought I would let you know, so you can fix your packages.
thanks for reporting this, seems that the elements folder is not listed in the templatedetails.xml file and therefore it does not get installed even though it's present in the file package.