I found my problem.. the file folder for the druid mana stuff was named LibDruidMana-2.0. When I renamed it to -1.0 I stopped getting the error and the bar worked fine. I just did a fresh install from the updater after fixing the issue and the folder was renamed back to -2.0 so something's screwy with the files it installs.
Love the changes made to this addon, but I am having one small problem with it. Whenever I set a bar to be interactive, it will only show me the player menu (the one with pvp flag and instance options) and not the target menu (the one with inspect, trade, whisper, etc) even if it's the target bar that's set to be interactive. Am I missing an option/setting for it or just need to wait for more updates?