NPE in RuleResolver

[rrayst]

Caused by: java.lang.NullPointerException: Cannot invoke "String.isEmpty()" because the return value of "java.net.URI.getQuery()" is null
	at com.predic8.membrane.core.resolver.RuleResolver.getPathAndQuery(RuleResolver.java:98)
	at com.predic8.membrane.core.resolver.RuleResolver.resolve(RuleResolver.java:74)

when starting 6.X with

<spring:beans xmlns="http://membrane-soa.org/proxies/1/"
              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-4.2.xsd
					    http://membrane-soa.org/proxies/1/ http://membrane-soa.org/schemas/proxies-1.xsd">

    <router>
        <internal name="msViaProxy">
            <httpClient />
            <target host="login.microsoftonline.com">
                <ssl/>
            </target>
        </internal>

        <api port="8080">
            <jwtAuth expectedAud="abc">
                <jwks jwksUris="internal://msViaProxy/449b8836-b962-4cb5-8778-b7c2adf5c951/discovery/v2.0/keys" />
            </jwtAuth>
            <target host="localhost" port="8081" />
        </api>

    </router>
</spring:beans>