Lightning Migration

I have migrated sandbox to lightning and then upgraded the Skuid version, do I need to follow any instruction after installing the new updates? I see one error at the top it says: 
There were 1 problems with this Skuid Page. Click to display…

  1. Theme could not be found. Test Defaulting to Classic.
    Also when I switch to lightning Campaign member page looks like simple lightning page  and I don’t see skuid page.

Nile, could you share a screenshot of the error?

For your Lightning Campaign member page, are you overriding that page with a Lightning page that contains your Skuid page? Lightning requires some set up for overrides, just like VF does.