No acknowledgement of completed lesson
For the third time, I've encountered the same problem when completing a lesson: Duolingo does not acknowledge that I successfully completed the lesson (even if I powered through with no errors), and therefore I cannot proceed to the next (locked) lesson. I'm currently on Adverbs 2. I completed the first of nine lessons three times now (getting tired/frustrated doing the same thing over), and no triumphant music or lingots earned to acknowledge completion.
The only way I was able to overcome this issue in previous sections was to test out of the entire section. I don't want to do this for adverbs, however, since I really need the practice/new knowledge here (don't even think I could since there are 8 additional lessons I haven't covered).
Ok, I switched to a third laptop, and I finally, received acknowledgement that I completed the lesson (after doing it yet again). My wireless is a bit slow at the moment, so I was surprised that it actually worked. I wondered if connection speed was somehow impeding the program, but I was having trouble when my connection was fairly fast and constant.