SDM 9.0.2 REST troubleshooting

Hello, colleagues.

Could you please advise a proper way of troubleshooting of REST API on SDP 9.0 ? I try to get a realm configuration by sending the XML request to /rest/v1.3/configuration/deviceConfigs/ID5/configElements/retrieve

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<configElement>

 <elementTypePath>realmConfig</elementTypePath>

   <attributes>

     <name>id</name>

     <value>peer-public-s0p0</value>

   </attributes>

</configElement>

and system returns the error 404, althoug this realm indeed exists in the configuration. All I can see is that syntax of the request is correct. Is there any log in SDM that explains the REST behavior? Maybe there is a possibility of debugging ?

Thanks and regards,