A TimThumb error has occured

The following error(s) occured:

Could not create the file cache directory.

Query String : src=http://gabrielrancourt.com/wp-content/uploads/2013/12/823487_10152532167720596_1048593011_o.jpg&h=0&w=1250&zc=0&ac=c&q=80
TimThumb version : 2.8.13