Schema Validation fails for Mock Service

I have created a MockService in soapUI v5.5.0, based on an existing WSDL. I’m trying to send soap requests to test the mock service through Katalon v6.3.3 but I’m getting the following error.

org.xml.sax.SAXParseException: The reference to entity “interface” must end with the ‘;’ delimiter.

SoapUI generates a wsdl for the mock service, that wsdl contains below lines.

<xsd:schema targetNamespace=“http://…”>
<xsd:include schemaLocation=“mockService?WSDL&interface=TNDService&part=ManageV4.xsd”/>

The issue is in &interface= , where & should be & amp; I did not generate this, soapUI does and the original WSDL does not have this either. How can I make soapUI generate a proper WSDL? Or what am I doing wrong?

This issue exist only in Katalon v6.3.3, tested the same scenario in Katalon v6.1.5 and I was able send soap requests successfully without any exceptions.