Error while running the .bat file

[sobolevspaces]

Hello there,

I'm trying to run JPCSP with the .bat file but i get this error msg from java that I don't really understand:

PS D:\emu\psp\jpcsp-windows-amd64> .\start-windows-amd64.bat
Running Jpcsp 64bit...
Exception in thread "GUI" java.lang.NullPointerException
at com.sun.java.swing.plaf.windows.XPStyle.getTypeEnumName(Unknown Source)
at com.sun.java.swing.plaf.windows.XPStyle.getBorder(Unknown Source)
at com.sun.java.swing.plaf.windows.WindowsLookAndFeel$XPBorderValue.getXPValue(Unknown Source)
at com.sun.java.swing.plaf.windows.WindowsLookAndFeel$XPValue.createValue(Unknown Source)
at com.sun.java.swing.plaf.windows.WindowsLookAndFeel$XPValue.recursiveCreateValue(Unknown Source)
at com.sun.java.swing.plaf.windows.WindowsLookAndFeel$XPValue.getClassicValue(Unknown Source)
at com.sun.java.swing.plaf.windows.WindowsLookAndFeel$XPValue.createValue(Unknown Source)
at javax.swing.UIDefaults.getFromHashtable(Unknown Source)
at javax.swing.UIDefaults.get(Unknown Source)
at javax.swing.MultiUIDefaults.get(Unknown Source)
at javax.swing.UIDefaults.getBorder(Unknown Source)
at javax.swing.UIManager.getBorder(Unknown Source)
at javax.swing.LookAndFeel.installBorder(Unknown Source)
at javax.swing.plaf.basic.BasicComboBoxUI.installDefaults(Unknown Source)
at javax.swing.plaf.basic.BasicComboBoxUI.installUI(Unknown Source)
at com.sun.java.swing.plaf.windows.WindowsComboBoxUI.installUI(Unknown Source)
at javax.swing.JComponent.setUI(Unknown Source)
at javax.swing.JComboBox.setUI(Unknown Source)
at javax.swing.JComboBox.updateUI(Unknown Source)
at javax.swing.JComboBox.init(Unknown Source)
at javax.swing.JComboBox.<init>(Unknown Source)
at jpcsp.log.LogWindow.<init>(LogWindow.java:97)
at jpcsp.MainGUI.<init>(MainGUI.java:156)
at jpcsp.MainGUI$58.run(MainGUI.java:2317)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Do I need to update my Java or something?
Additional info: I got an Ati Radeon HD3850

Thank you very much for the help