DNN 7.4.2 2SXC 8.8.0
I upgraded to 8.8.0 from 5.5.0. The upgrade went successfully. I only had 2 content types and templates. Now I've added many new content types and templates (more than a dozen) and I've started adding them to my pages.
I'm running into a problem where, every once in awhile, when I browse to a page with Content dropped on the page, I see a module error message that says "Data is missing - usually when a site is copied but the content / apps have not been imported yet..." The error appears for each Content module on the page.
The strange thing is that I never actually exported/imported - I created all my content types and templates from scratch. The problem is also intermittent - sometimes I see the problem, other times it looks normal.
I know our site has some caching on it. Could that be the problem?