Erreur cURL error 3: URL using bad/illegal format or missing URL

Erreur cURL error 3: URL using bad/illegal format or missing URL

Erreur cURL error 3: URL using bad/illegal format or missing URL

Erreur A feed could not be found at `http://www.w3.org/1999/xhtml`; the status code is `200` and content-type is `text/html; charset=utf-8`