java.lang.NullPointerException

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    • java.lang.NullPointerException at java.awt.Container.addImpl(Container.java:1093) at java.awt.Container.add(Container.java:417) at AcmeSelfServe.createUserInterface(AcmeSelfServe.java:109) at AcmeSelfServe.<init>(AcmeSelfServe.java:55) at AcmeSelfServe.main(AcmeSelfServe.java:190)

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