Board Thread:Support Requests - Getting Technical/@comment-4503522-20190824043246/@comment-27958705-20190824052217

if you have two or more similar styles, then works the last one. in your case: .trivia ul.tabbernav li.tabberactive a {} .ttabber ul.tabbernav li.tabberactive a {} so ttabber overrides trivia.

i'd suggest to not use nested tabbers.