same problem as already described but I didn't find any solutions in the forum..
I tried updating Lay Theme and Wordpress today and now my website totally crashed.
URL is: www.magdalena-fischer.com
I can't access anything anymore (also not the admin page) due to "HTTP ERROR 500".
I already chattet with the customer service of my Hosting provider, when they changed the theme everything worked fine, now back on laytheme I'm back to Error 500.
Pls help : ((