I'm running the 2.8.1 firmware and had the same problem. I've read here (http://forums.kali.org/archive/index.php/t-89.html) that, in order to run wash, you need this package "libsqlite3-dev", at least in regular GNU/Linux distros.
Besides that, it seems that you also need to create the directory "/etc/reaver/" (http://em3rgency.com/a-great-kali-update-script/):
...
#FIX wash
apt-get -y install libsqlite3-dev &>/dev/null
mkdir -p /etc/reaver &>/dev/null
...
So, in my case, after finding out that the package "libsqlite3" was already installed, I created the "/etc/reaver" dire