47.8 - NPE changing campaign date

[NickAragua]

Encountered the following error when attempting to change campaign date in mekhq, campaign options -> general.

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: temporal
at java.util.Objects.requireNonNull(Unknown Source)
at java.time.format.DateTimeFormatter.formatTo(Unknown Source)
at java.time.format.DateTimeFormatter.format(Unknown Source)
at mekhq.gui.dialog.DateChooser$1.valueToString(DateChooser.java:175)
at javax.swing.JFormattedTextField$AbstractFormatter.install(Unknown Source)
at javax.swing.JFormattedTextField.setFormatter(Unknown Source)
at javax.swing.JFormattedTextField.setValue(Unknown Source)
at javax.swing.JFormattedTextField.setFormatterFactory(Unknown Source)
at mekhq.gui.dialog.DateChooser.(DateChooser.java:165)
at mekhq.gui.dialog.CampaignOptionsDialog.btnDateActionPerformed(CampaignOptionsDialog.java:5118)

Save file and customs:
customs.zip