[SalesForce] 405 – HTTP verb used to access this page is not allowed

I am trying to configure my POSTMAN as per the below article
https://gortonington.com/introduction-to-making-api-calls-to-sfmc-from-postman/

But I am facing the Error – 405 – HTTP verb used to access this page is not allowed.

I verified the below,
1) A valid "accessToken" is set. [confirmed by making a REST API]
2) All Environment variables are set correctly.
3) Set header variable, SoapAction: Retrieve

Code below for reference,

<?xml version="1.0" encoding="UTF-8"?>
<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:u="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
   <s:Header>
      <a:Action s:mustUnderstand="1">Retrieve</a:Action>
      <a:MessageID>urn:uuid:7e0cca04-57bd-4481-864c-6ea8039d2ea0</a:MessageID>
      <a:ReplyTo>
         <a:Address>http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous</a:Address>
      </a:ReplyTo>
      <a:To s:mustUnderstand="1">{{soapEndPoint}}</a:To>
      <fueloauth xmlns="http://exacttarget.com">{{accessToken}}</fueloauth>
   </s:Header>
   <s:Body xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
      <RetrieveRequestMsg xmlns="http://exacttarget.com/wsdl/partnerAPI">
         <RetrieveRequest>
            <ObjectType>Subscriber</ObjectType>
            <Properties>SubscriberKey</Properties>
            <Properties>EmailAddress</Properties>
            <Properties>Status</Properties>
            <Filter xmlns:q1="http://exacttarget.com/wsdl/partnerAPI" xsi:type="q1:SimpleFilterPart">
               <q1:Property>SubscriberKey</q1:Property>
               <q1:SimpleOperator>equals</q1:SimpleOperator>
               <q1:Value>0032E00002QV2wMQAT</q1:Value>
            </Filter>
         </RetrieveRequest>
      </RetrieveRequestMsg>
   </s:Body>
</s:Envelope>