PHP: <br />
<b>Fatal error</b>:  Uncaught Error: Class &quot;IXR_Client&quot; not found in /www/habi.gna.ch/doc/wp-includes/IXR/class-IXR-clientmulticall.php:8
Stack trace:
#0 {main}
  thrown in <b>/www/habi.gna.ch/doc/wp-includes/IXR/class-IXR-clientmulticall.php</b> on line <b>8</b><br />