Why I got " Module provided in the request is not supported. " ?

Why I got " Module provided in the request is not supported. " ?

Hello Sir

When I Access this Website

http://<My IP>:8080/sdpapi/change/208?OPERATION_NAME=GET&TECHNICIAN_KEY=xxxxx

( I want to use php file_get_contents() in this website )

and I got this error

   <operation name="GET">
  

      <result>
     
       <status>
       Failed
       </status>
      
       <message>
       Module provided in the request is not supported.
       </message>
      
      </result>

   </operation>
  

I use Sevice Desk version 8.3 Build 8311

Thank you Very much

Chatchawan U-patham