Fatal error: Class 'WP_Http' not found

Fatal error: Class 'WP_Http' not found in /home/***/public_html/wp-includes/http.php on line 26

I use the WHMCS Wordpress integration plugin and provisionnng plugis

se', 'cookies', 'filename'. A WP_Error instance upon error */ public function head($url, $args = array()) { $defaults = array('method' => 'HEAD'); $r = wp_parse_args( $args, $defaults ); return $this->request($url, $r); } /** * Parses the responses and splits the parts into headers and body. * * @access public * @static * @since 2.7.0 * * @param string $strResponse The full response string * @return array Array with 'headers' and 'body' keys. */ public static function processResponse($strResponse) { $res = explode("\r\n\r\n", $strResponse, 2); return array('headers' => $res[0], 'body' => isset($res[1]) ? $res[1] : ''); } /** * Transform header string into an array. * * If an array is given then it is assumed to be raw header data with numeric keys with the * headers as the values.

I had that issue before and I deleted the cache but I don't have any now. Yesterday I got to resolve it but the error is back again. Thank you