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java.lang.NullPointerException: 	at sun.net.www.http.KeepAliveStream.close(Unknown Source)	at java.io.FilterInputStream.close(Unknown Source)	at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.close(Unknown Source)	at sun.plugin.usability.ProgressInputStream.close(Unknown Source)	at java.io.FilterInputStream.close(Unknown Source)	at javax.swing.JEditorPane.read(Unknown Source)	at javax.swing.JEditorPane$PageLoader.run(Unknown Source)