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java.lang.NoClassDefFoundError: com/sun/jna/Library	at java.lang.ClassLoader.defineClass1(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:800)	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)	at webcamstudio.exporter.vloopback.VideoDevice.openDevice(VideoDevice.java:46)	at webcamstudio.exporter.vloopback.VideoDevice.loadInfo(VideoDevice.java:40)	at webcamstudio.exporter.vloopback.VideoDevice.(VideoDevice.java:36)	at webcamstudio.exporter.vloopback.VideoDevice.getDevices(VideoDevice.java:147)	at webcamstudio.exporter.vloopback.VideoDevice.getInputDevices(VideoDevice.java:106)	at webcamstudio.components.OutputPanel.paintWSCamButtons(OutputPanel.java:588)	at webcamstudio.components.OutputPanel.(OutputPanel.java:96)