The most common cause of this is a import in the WSDL that is not accessible by qie. The import points the WSDL to another URL to get additional information.
Currently the only way to get this to save in qvera is to remove the import line that is failing.
<wsdl:import location="https://donotwork.donotwork.com/?wsdl=test" namespace="http://test.test.test"/>
The way to find the import line that is failing is to review the "qie.log" in the "C:/programdata/qie/logs" folder. Look for the following "ERROR com.eviware.soapui.impl.wsdl.support.wsdl.WsdlLoader -". This will have a URL that you can search for in the wsdl.