[VE][338] Add Subject Here

My website was valid until I included your link to the validator. This is
just one error which has been displayed. All the errors are contained within
the url that was given to me
(http://validator.w3.org/check?uri=http%3A%2F%2Fchinchilladesigns.scriptplay
ground.com%2F) . Is there a solution to this or an alternative link? 
 
Many thanks,
Jonathon 
Validating http://chinchilladesigns.scriptplayground.com/ 
Error [338]: "cannot generate system identifier for general entity X"