Runtime Exception

Hello, launching this call:
WS.verifyElementPropertyValue(response, ‘.//multiRef/esito’, ‘OK’)

I get the following error:
Caused by: java.lang.RuntimeException: Lo spazio di nomi per il prefisso ‘soapenv’ non è stato dichiarato.

My response is:

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

<soapenv:Envelope xmlns:soapenv=“http://schemas.xmlsoap.org/soap/envelope/” xmlns:xsd=“http://www.w3.org/2001/XMLSchema” xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance”>
soapenv:Body
<ns1:activateLineResponse soapenv:encodingStyle=“http://schemas.xmlsoap.org/soap/encoding/” xmlns:ns1=“http://service.abic.com”>

</ns1:activateLineResponse>

Do you have any suggestions?
I noticed that it is the same case reported here:
https://bugs.openjdk.java.net/browse/JDK-4641035

Thank you.