java.lang.NullPointerException: This exception has no message.

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via Oracle Community by 807596, 1 year ago
This exception has no message.
java.lang.NullPointerException:
at sun.net.www.protocol.jar.JarURLConnection.getHeaderField(JarURLConnection.java:176)
at java.net.URLConnection.getContentEncoding(URLConnection.java:392)
at javax.swing.JEditorPane.getStream(JEditorPane.java:700)
at javax.swing.JEditorPane.setPage(JEditorPane.java:392)

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