You have used character data somewhere it is not permitted to appear. Mistakes that can cause this error include putting text directly in the body of the document without wrapping it in a container element (such as a <p>aragraph</p>) or forgetting to quote an attribute value (where characters such as "%" and "/" are common, but cannot appear without surrounding quotes).
savez-vous d'ou vient le probleme ? a savoir que cette balise <meta> est située juste apres l'ouverture de ma balise <head>
