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

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java.lang.NullPointerException:
at packages.CustomActionListener.(Menu.java:101)
at packages.MyFirstPanel.(Menu.java:75)
at packages.Menu.createFirstPanel(Menu.java:44)
at packages.Menu.createPanels(Menu.java:38)
at packages.Menu.runGUI(Menu.java:21)
at packages.Menu.main(Menu.java:64)

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