Search not working.

[hifall]

Thanks for this nice theme!

I have installed this theme, and the simpleSearch plugin. I then navigate to the home page of the blog, the page appears with a search box at the top-right corner. I enter some text like "install", which is supposed to return an article (I use the demo pages provided by this theme), but it does not.

Here is the error in the browser console in case it's helpful:

Any idea?