I deactivated ADBlock, but no change. Then I tried to go on LingQ with Safari (after reading other comments) and this time it worked. Unfortunately, it still messed up on Firefox. I do hope you can find and fix this problem; I still prefer to do everything on Firefox and hardly ever use Safari, but at least for right now, while waiting for the “fix,” I am glad I can continue to work on my lessons. Thank you for working on it! 
PS I spoke too soon! I tried to work on one imported lesson on Safari, but I am unable to open the dictionaries to find a better translation of a word or expression I don’t know. I guess, I can work on the lesson, but only when I accept the translation given. Same as Evgueny.
