Thread:Project:Support desk/Infoboxes - Including An Image Causes An Exception

I am creating a Wiki using MediaWiki, and I'm using InfoBoxes. However, for some reason, I can't seem to include images.

MediaWiki Version: 1.22

PHP Version: 5.3.3

SQLITE Version: 3.6.20

URL: http://corstekistan.usr.sh/wiki

My infobox code is below:

The infobox renders fine when the image field is populated. However, when I tried to add an image (IanDuncan.jpg), upon saving I got this error message:

[0a348e3f] 2013-12-28 17:59:33: Fatal exception of type MWException

What am I doing wrong?