Error when creating a new Soap project

I get this error when trying to create a new SoapUI request, when a proxy information is configured in the preference(File>Preferences>Proxy Setting). I'm using a WSDL supplied by Oracle. 

I do not get the same error for all of their WSDLs, just this one. And the error occurrs only when creating a new project when I am behind the proxy. If I remove the proxy setting, and connect to non-proxy network, I am able to create a project. Once created, I can get back to the proxy network and run a request of the project.

Attached is the WSDL file. Any help would be appreciated, thank you.