troubleshooting！why can't i begin my new lesson
it goes well yesterday,but can't use today ,other button is ok ,but just can't begin the lesson,is something wrong with the Internet？
for now, start your practicing through these links (if want to continue change the last "1" to "2" and so on), meanwhile edit this post and change topic to troubleshooting...cause it needs staff's attention...users are helpless in these kinds of situation.
if none of them responded within two days, go leave a comment directly in one of their profiles. don't worry it happened to me too. staff will fix that up.