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java.lang.IllegalArgumentException: No enum constant biz.ganttproject.core.calendar.CalendarEvent.Type.WORKING	at java.lang.Enum.valueOf(Enum.java:238)	at biz.ganttproject.core.calendar.CalendarEvent$Type.valueOf(CalendarEvent.java:39)	at net.sourceforge.ganttproject.parser.HolidayTagHandler.loadHoliday(HolidayTagHandler.java:117)	at net.sourceforge.ganttproject.parser.HolidayTagHandler.endElement(HolidayTagHandler.java:71)	at net.sourceforge.ganttproject.io.XmlParser.endElement(XmlParser.java:88)	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:609)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1783)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2970)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:643)	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:327)	at javax.xml.parsers.SAXParser.parse(SAXParser.java:195)	at net.sourceforge.ganttproject.io.XmlParser.parse(XmlParser.java:110)	at net.sourceforge.ganttproject.calendar.GPCalendarProvider.readCalendar(GPCalendarProvider.java:89)	at net.sourceforge.ganttproject.calendar.GPCalendarProvider.readCalendars(GPCalendarProvider.java:109)	at net.sourceforge.ganttproject.calendar.GPCalendarProvider.getInstance(GPCalendarProvider.java:129)	at net.sourceforge.ganttproject.gui.projectwizard.WeekendConfigurationPage.createCalendarOption(WeekendConfigurationPage.java:211)	at net.sourceforge.ganttproject.gui.projectwizard.WeekendConfigurationPage.(WeekendConfigurationPage.java:154)	at net.sourceforge.ganttproject.gui.projectwizard.NewProjectWizardWindow.addWeekendConfigurationPage(NewProjectWizardWindow.java:52)	at net.sourceforge.ganttproject.gui.projectwizard.NewProjectWizard.createNewProject(NewProjectWizard.java:33)	at net.sourceforge.ganttproject.gui.ProjectUIFacadeImpl.showNewProjectWizard(ProjectUIFacadeImpl.java:300)	at net.sourceforge.ganttproject.gui.ProjectUIFacadeImpl.createProject(ProjectUIFacadeImpl.java:295)	at net.sourceforge.ganttproject.GanttProject.newProject(GanttProject.java:600)	at net.sourceforge.ganttproject.action.project.NewProjectAction.actionPerformed(NewProjectAction.java:41)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)	at javax.swing.AbstractButton.doClick(AbstractButton.java:376)	at com.apple.laf.ScreenMenuItem.actionPerformed(ScreenMenuItem.java:125)	at java.awt.MenuItem.processActionEvent(MenuItem.java:669)	at java.awt.MenuItem.processEvent(MenuItem.java:628)	at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:351)	at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:339)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:761)	at java.awt.EventQueue.access$500(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:709)	at java.awt.EventQueue$3.run(EventQueue.java:703)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)	at java.awt.EventQueue$4.run(EventQueue.java:731)	at java.awt.EventQueue$4.run(EventQueue.java:729)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)