java.net.UnknownHostException: This exception has no message.

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java.net.UnknownHostException:
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:867)
at java.net.InetAddress.getAddressFromNameService(InetAddress.java:1246)
at java.net.InetAddress.getAllByName0(InetAddress.java:1197)
at java.net.InetAddress.getAllByName(InetAddress.java:1128)
at java.net.InetAddress.getAllByName(InetAddress.java:1064)
at java.net.InetAddress.getByName(InetAddress.java:1014)
at net.rptools.maptool.model.GUID.(GUID.java:49)
at net.rptools.maptool.model.Campaign.(Campaign.java:54)
at net.rptools.maptool.client.MapTool.getCampaign(MapTool.java:614)
at net.rptools.maptool.client.ui.macrobuttons.panels.CampaignPanel.init(CampaignPanel.java:33)
at net.rptools.maptool.client.ui.macrobuttons.panels.CampaignPanel.(CampaignPanel.java:28)
at net.rptools.maptool.client.ui.MapToolFrame.(MapToolFrame.java:216)
at net.rptools.maptool.client.MapTool.initialize(MapTool.java:445)
at net.rptools.maptool.client.MapTool.access$2(MapTool.java:410)
at net.rptools.maptool.client.MapTool$6.run(MapTool.java:1027)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:602)
at net.rptools.maptool.client.swing.MapToolEventQueue.dispatchEvent(MapToolEventQueue.java:24)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)

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