Mobile Website Returning Content Length 0 Bytes (Empty) after 2.8 upgrade to 3.1

Topics: Themes
May 25, 2015 at 5:44 AM
I upgraded from 2.8 to 3.1 and followed all instructions.
Everything worked fine. except that on my mobile site (Chrome on Android, FireFox on Android, IE 11 Mobile Emulator, Google Chrome Emulator) nothing was being returned by the website.

after lots of struggling I found out that somehow my setting for Mobile Themes was Empty (Null). After I changed that to Standard. Everything started working fine.