Can't open Vietnamese Slang lesson 3. Help!
I can't open Vietnamese Slang lesson 3. It just goes back to the tree page. Is anyone else having this problem? Administrators?
I also filed a bug report. I'm using Safari Version 10.0 (11602.1.50.0.10) on OS X 10.11.6.
Edit: same result with Chrome 53.0.2785.143 (64-bit)