Next module won't open

Let's see if we can get you to the next module!

Question:
Did you complete the previous module? 
It will not let you go forward if you have not completed the previous module. 

Here are two questions to ask yourself:
Did the video in the previous module go to the very end? 
Did you click on the button that confirms you completed the previous module?

Those two things solve 99% of the problems. 

Let me know if that worked. :)