I completed a module with a 5/5 and it did not open the next module like it was supposed to. So, I answered the questions again, hoping it would open it, but it did not. I restarted my computer, logged out and logged back in, and when I tried opening the module that I had finished, I just got a blank screen that says, "invalid launch." I've tried several times to log out and log back in to open the module, and it's the same error. Would really like to finish all of my work before the holiday/deadline.