How to fix "cannot get property 'info' on null object' when importing swagger

Also, it loads without error in swagger UI...

And further, I've now located the error logs and include them here:

Thu Feb 08 15:16:10 AEDT 2018:ERROR:java.lang.NullPointerException: Cannot get property 'info' on null object
   java.lang.NullPointerException: Cannot get property 'info' on null object
   	at org.codehaus.groovy.runtime.NullObject.getProperty(NullObject.java:60)
   	at org.codehaus.groovy.runtime.InvokerHelper.getProperty(InvokerHelper.java:172)
   	at org.codehaus.groovy.runtime.callsite.NullCallSite.getProperty(NullCallSite.java:47)
   	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:296)
   	at com.smartbear.swagger.Swagger2Importer.createRestService(Swagger2Importer.groovy:306)
   	at com.smartbear.swagger.Swagger2Importer.this$2$createRestService(Swagger2Importer.groovy)
   	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   	at java.lang.reflect.Method.invoke(Method.java:498)
   	at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:210)
   	at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:59)
   	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:52)
   	at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:64)
   	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:174)
   	at com.smartbear.swagger.Swagger2Importer.importSwagger(Swagger2Importer.groovy:87)
   	at com.eviware.soapui.impl.rest.actions.service.UpdateRESTServiceWizard.a(UpdateRESTServiceWizard.java:148)
   	at com.eviware.soapui.impl.rest.actions.service.UpdateRESTServiceWizard.perform(UpdateRESTServiceWizard.java:173)
   	at com.eviware.soapui.impl.rest.actions.service.UpdateRESTServiceWizard.perform(UpdateRESTServiceWizard.java:1)
   	at com.eviware.soapui.support.action.swing.SwingActionDelegate.actionPerformed(SwingActionDelegate.java:129)
   	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
   	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
   	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
   	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
   	at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
   	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
   	at com.apple.laf.AquaMenuItemUI.doClick(AquaMenuItemUI.java:157)
   	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
   	at java.awt.Component.processMouseEvent(Component.java:6533)
   	at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
   	at java.awt.Component.processEvent(Component.java:6298)
   	at java.awt.Container.processEvent(Container.java:2236)
   	at java.awt.Component.dispatchEventImpl(Component.java:4889)
   	at java.awt.Container.dispatchEventImpl(Container.java:2294)
   	at java.awt.Component.dispatchEvent(Component.java:4711)
   	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
   	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
   	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
   	at java.awt.Container.dispatchEventImpl(Container.java:2280)
   	at java.awt.Window.dispatchEventImpl(Window.java:2746)
   	at java.awt.Component.dispatchEvent(Component.java:4711)
   	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
   	at java.awt.EventQueue.access$500(EventQueue.java:97)
   	at java.awt.EventQueue$3.run(EventQueue.java:709)
   	at java.awt.EventQueue$3.run(EventQueue.java:703)
   	at java.security.AccessController.doPrivileged(Native Method)
   	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
   	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
   	at java.awt.EventQueue$4.run(EventQueue.java:731)
   	at java.awt.EventQueue$4.run(EventQueue.java:729)
   	at java.security.AccessController.doPrivileged(Native Method)
   	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
   	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
   	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

Perhaps a problem with the Swagger2Importer.groovy in ReadyAPI (the not open source version), perhaps a problem with your YAML, or both, but I don't know because I can't see either of them.

You or somebody else should move this to the ReadyAPI section?

Sure - just keep in mind that most of the posters here (including myself) are just users of the Open Source version. That's why I posted in a way to let you know that I know nothing about ReadyAPI (I've not used, not even the trial).

What I or others post in this section doesn't represent the quality of the support from the SmartBear team for pro users in the pro section.