Error response returned from Offer API when tested from SOAPUI

Hello Folks,

Hope you're doing good and safe!

I am trying a Interaction API call (Propose Method) from SOAPUI and below are the details:

Request URL: https://<SERVER_NAME>/interaction/liveRcp/sms.

Where, liveRcp is Environment and sms is Offer Space. 

Request:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:nms:interaction"> <soapenv:Header/>
<soapenv:Body>
<Propose>
<sessiontoken>SESSION_TOKEN</sessiontoken>
<targetId>EMAIL_ID</targetId>
<maxCount>2</maxCount>
<categories></categories>
<themes></themes>
<context>
<interaction>
<inbound>true</inbound>
</interaction>
</context>
</Propose>
</soapenv:Body>
</soapenv:Envelope>

So before hitting this, I created Offer Space, Offer and published to Live successfully. But the response I am getting is as below

Response:

<SOAP-ENV:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns="http://xml.apache.org/xml-soap" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Body>
<SOAP-ENV:Fault>
<faultstring>The offer space with the 'liveRcp|sms' key hasn't been published.</faultstring>
</SOAP-ENV:Fault>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

As offer space is published and present in live, unable to understand as why this error is returned.  Checked similar posts posted earlier, but no luck. Would request your help here, quick response is appreciated.

Thanks,

Sri Bhargav