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

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java.lang.NullPointerException:
at scanstation.LoginScreen.displayLogInInformation(LoginScreen.java:221)
at scanstation.LoginScreen.jButton1_actionPerformed(LoginScreen.java:151)
at scanstation.LoginScreen.passwordTextfield_actionPerformed(LoginScreen.java:256)
at scanstation.LoginScreen$4.actionPerformed(LoginScreen.java:123)
at javax.swing.JTextField.fireActionPerformed(JTextField.java:421)

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