Mule / Maven Error: Invalid content was found starting with element 'dw:transform-message'

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

<mule xmlns:json="http://www.mulesoft.org/schema/mule/json" xmlns:metadata="http://www.mulesoft.org/schema/mule/metadata" 
	xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns:context="http://www.springframework.org/schema/context" 
	xmlns:file="http://www.mulesoft.org/schema/mule/file" xmlns:dw="http://www.mulesoft.org/schema/mule/ee/dw" 
	xmlns:db="http://www.mulesoft.org/schema/mule/db" xmlns="http://www.mulesoft.org/schema/mule/core" 
	xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
	xmlns:spring="http://www.springframework.org/schema/beans" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/db http://www.mulesoft.org/schema/mule/db/current/mule-db.xsd
http://www.mulesoft.org/schema/mule/file http://www.mulesoft.org/schema/mule/file/current/mule-file.xsd
http://www.mulesoft.org/schema/mule/ee/dw http://www.mulesoft.org/schema/mule/ee/dw/current/dw.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-current.xsd
http://www.mulesoft.org/schema/mule/json http://www.mulesoft.org/schema/mule/json/current/mule-json.xsd">
    <db:generic-config name="LocalDev_SqlServerConfig" url="jdbc:sqlserver://${mssql.server}:${mssql.port};databaseName=${mssql.database};user=${mssql.user};password=${mssql.password}" driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver" doc:name="Generic Database Configuration"/>

    <http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="${http.port}" basePath="/api" doc:name="HTTP Listener Configuration"/>
    <db:generic-config name="GenericMsSqlDbConnection" url="jdbc:sqlserver://${db.server}:${db.port};databaseName=${db.database};user=${db.user};password=${db.password}" driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver" doc:name="Generic Database Configuration"/>
    <context:property-placeholder location="main-${env}.properties"/>
    <flow name="mainFlow">
        <http:listener config-ref="HTTP_Listener_Configuration" path="/test" allowedMethods="GET" doc:name="HTTP">
            <http:response-builder statusCode="200" reasonPhrase="OK"/>
            <http:error-response-builder statusCode="500" reasonPhrase="Internal server error"/>
        </http:listener>
        <set-property propertyName="currentDate" value="#[server.dateTime.getDayOfMonth() +&quot;/&quot;+ server.dateTime.getMonth() +&quot;/&quot; +server.dateTime.getYear()]" doc:name="Set Date Property"/>
        <set-property propertyName="hostname" value="#[server.host]" doc:name="Set Server Property"/>
        <logger message="Set property &quot;currentDate&quot; to #[message.outboundProperties.currentDate]" level="INFO" doc:name="Logger"/>
        <db:select config-ref="GenericMsSqlDbConnection" doc:name="Database">
            <db:parameterized-query><![CDATA[SELECT COUNT(*) AS OpportunityCount FROM vwOppsAnon1]]></db:parameterized-query>
        </db:select>
        <dw:transform-message metadata:id="480debf4-819f-4927-90ae-382a17489221" doc:name="Transform Message">
            <dw:set-payload><![CDATA[%dw 1.0
%output application/json
---
payload map ((payload01 , indexOfPayload01) -> {
	opportunityCount: payload01.OpportunityCount,
	date: outboundProperties.currentDate as :string,
	server: outboundProperties.hostname
})]]></dw:set-payload>
        </dw:transform-message>
    </flow>
</mule>