Can't upload contacts

I took the following steps:
logged into Lebo's account (lebohang@praekelt.com)
navigated to: https://go.vumi.org/contacts/people/
clicked on "import contacts"
selected a CSV from my drive
named a new group and clicked upload (I got the same when I tried to upload to an existing group)
Got the attached error message.

I also, weirdly, never received an email with the error message

![screen shot 2013-10-02 at 12 04 01 pm](https://f.cloud.github.com/assets/1521387/1252423/d62e61b8-2b49-11e3-92cc-7cf8a23c1981.png)