Can't progress past lesson 9!


After I pass lesson 9, I see a quiz screen for about 3 seconds and then the screen turns white. Permanently. I use Fedora 27 and Firefox 50. Here is a screenshot to show what it looks like:



Codecademy PLEASE fix. I want to learn Sass for my website but I cannot progress.:cry:


Found fix! I have to go back to the Codecademy home page and navigate to the Sass course on my user profile. Codecademy, this is confusing. Please fix.