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java.awt.HeadlessException: null	at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207)	at java.awt.Window.(Window.java:535)	at java.awt.Frame.(Frame.java:420)	at java.awt.Frame.(Frame.java:385)	at javax.swing.JFrame.(JFrame.java:174)	at org.multibit.hd.ui.error_reporting.ErrorReportingDialog.(ErrorReportingDialog.java:78)