Error messages when loading after update

Hi, I really like your theme. Simple and clean. However, after updating to the latest version (1.2.0), I am getting strange error messages on every pageload.

Wordfence reports like this: “tried to access non-existent page http://borthittad.se/undefined?1457347978522”
In Chrome console, it looks like this: http://imgur.com/rwVkYsG

http://borthittad.se

Can you help?