AWT-Eventqueue-0; java.lang.NoSuchFieldError: FAIL ON READING DUP TREE KEY

Hi

When I import a new project into the Ready API, I am getting the following error in the logs

Wed Jun 27 14:21:20 EDT 2018: ERROR: Uncaught exception in Thread "AWT-EventQueue-0":
java.lang.NoClassDefFoundError: Could not initialize class com.eviware.soapui.support.JsonUtil
at com.eviware.soapui.impl.wsdl.WsdlProjectProFactory.a(WsdlProjectProFactory.java:186)
at com.eviware.soapui.impl.wsdl.WsdlProjectProFactory.createNew(WsdlProjectProFactory.java:127)
at com.eviware.soapui.impl.wsdl.WsdlProjectProFactory.createNew(WsdlProjectProFactory.java:1)
at com.eviware.soapui.impl.WorkspaceImpl.importProjectInternal(WorkspaceImpl.java:674)
at com.eviware.soapui.impl.WorkspaceImpl.importProject(WorkspaceImpl.java:657)
at com.eviware.soapui.impl.actions.InternalProImportWsdlProjectAction.perform(InternalProImportWsdlProjectAction.java:60)
at com.eviware.soapui.impl.actions.ProImportWsdlProjectAction.perform(ProImportWsdlProjectAction.java:18)
at com.eviware.soapui.impl.actions.ImportWsdlProjectAction.perform(ImportWsdlProjectAction.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$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:842)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:886)
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:2237)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4889)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4526)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4467)
at java.awt.Container.dispatchEventImpl(Container.java:2281)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
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:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
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)

I am unable to save my workspace, my projects or even import new projects to the workspace I am currently working on. Everytime I restart Ready API, all my progress is halted and I keep going back to default-workspace. 

Tried: 

1. Restarting Ready API (Several times)

2. Restarting PC (Several times)

3. Uninstall and reinstall Ready API (one time)

I also uninstalled my JAVA (JRE) and reinstalled it. The issue still keeps happening. 

Additional info : 

I have a license for SOAP UI in Ready API 

I am using Windows 10 machine (i5 processor with 8gig ram - adequate for my tasks)

Sample xml project file & a saved workspace are attached

Ready API info: 

ReadyAPI 2.4.0
© SmartBear Inc. 2007-2018
http://www.smartbear.com

Build Date: 2018-06-04T12:31:42Z(801)
2135779ea75f16985e7de3f9dc6b6f383076f926
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