The pull request I submitted to address the errors when loading the WebGUI page for Unbound on the 3006.102.1 F/W has now been merged into the 'develop' branch. I'm assuming that at some point in the near future, the PR will be included in the next master release....
The Unbound Graphical Statistics GUI Add-on is the only remaining item that I have used in the past that I'm missing, but I see that you are working that one as well! Thanks again!
FYI.