Dear Carolina,
big fan of your work and the Aaron theme, thank you very much!
After updating my WordPress version (and Aaron version), I had a similar problem, maybe it is the same.
The website works perfect when I am logged in, but when I am not logged in, I just get a white page.
I notice that, when you look at the html, it is simply the closing tag of <style> that is missing (there is no </style> in the front page), therefore I only get a white page.
Maybe others have the same problem?
Kind greetings from Belgium