Extra Skills can't strengthen
When I try to do Strengthen Skills, it takes me back to duolingo.com. However, I can do individual lessons. Is this a bug? (The extra skills are idioms and flirting)
Since the topic is a few months old, I thought I'd give it a bump. I still have difficulty strengthening the extra skills (Flirting mostly, sometimes Idioms). It either takes me back to the home page or takes me through a lesson that is the same sentence 20 times and then doesn't count for XP or as being strengthened. Not really a big deal, but the completionist in me wants to keep everything topped off.