Major issues with Astoria 6.4 (recent upgraded) (Creating new Projects) parsing XML files fail with WS 10.4.03: Has anybody else had this issue?

We just upgraded our CMS to Astoria 6.4, and now all new projects fail to be created, surprising older projects can be returned without issues. 

"com.idiominc.webservices.client.WSRuntimeException (covers java.lang.RuntimeException: org.xml.sax.SAXException: Invalid element in com.idiominc.webservices.data.WorkflowWSProjectType - optionalAttributeDescriptors)"