Please upgrade to 2.2 here.
The 2.0 and 2.1 branches are no longer being updated.
[Solved] What is wrong with my forum?
I created my vanilla forum today - ronakg.vanillaforums.com. I was playing with the themes and I tried to make a custom theme and clicked the preview button. Since then nothing is appearing on my forum page mentioned above. I have tried to set one of the default themes etc, but nothing works.