/wp-content/themes/product/_inc/css/custom.css

Hi,

With Visitor Maps Online I can tell that most visitors are dropping out at
/wp-content/themes/product/_inc/css/custom.css
They then get the
"Sorry, we can't find the content you're looking for at this URL. Please try selecting a menu item from above or to the side of this message to get where you'd like to go."

What would cause this... how do I fix?

Thx.