Lamp class lessons not working
I am having troubles with two lessons in one class (The Lamps Class). When I am logged in I can see and complete all of the other lessons but when I look at lesson 8 or 9 the website makes it seem like I am not logged in (my profile disappears from the upper right hand corner of the page) and so I cannot complete the lesson. This problem only happens on lesson 8 and 9 of the Lamps class but I have not seen this problem in other classes or other pages.
My browser is Google Chrome(Version 56.0.2924.87) which I am running on a 32bit Windows 7 system.