Why this SoapFault on PHP SOAP access

one text

In an attempt to implement a PHP SOAP project, I tested as in the following link

https://www.thecannonhut.com/webservices/soap/index.html

adapted to my environment

on the server side, i changed to

$options = array("uri" => "http://151.93.94.62/ffpprod");

on the client side, i changed to

$options = array("location" =>"http://151.93.94.6\n  StreamAccessException was caused by NotFoundException2/ffpprod/soap_service.php",
                "uri" => "http://151.93.94.62/ffpprod");

I have this error