I also got this same message yesterday when upgrading from 1.5.0 to 2.0.6 of Supernova. There was nothing about any of the pages even close to what they were, and everything seemed aligned vertical, no sliders anymore, things were all screwed up. I tried customizing, saving, updating, changing, and everything I could think of, but it didn’t seem to make much difference. A box would come up that displayed ERROR in it on several things I tried, but didn’t say what the error was. I selected every other theme available and they all worked and looked more normal, just not what I wanted. So I finally restored back to the previous level and haven’t found anyone else commenting that has had the problem and reported it and how to fix. It’d like to upgrade, but I need to know something else to try first. Has anyone upgraded successfully to 2.0.6? Thanks,
