A TimThumb error has occured

The following error(s) occured:

Could not find the internal image you specified.

Query String : src=/upload/resize_cache/iblock/a6f/400_194_1f88da2b4740de19584cdff1727090349/a6f4d429a18f78329fbb57cda397690f.jpg&w=373&h=373&zc=2
TimThumb version : 2.8.11