java.lang.ClassNotFoundException: org.netbeans.swing.laf.dark.DarkMetalLookAndFeel
   at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
Caused: java.lang.ClassNotFoundException: org.netbeans.swing.laf.dark.DarkMetalLookAndFeel starting from SystemClassLoader[549 modules] with possible defining loaders null and declared parents [org.netbeans.MainImpl$BootClassLoader@21b8d17c, ModuleCL@3ae8cce3[org.netbeans.api.annotations.common], ModuleCL@ab8c747[org.openide.awt], ModuleCL@72e5da17[org.netbeans.modules.queries], ModuleCL@704c33f0[org.netbeans.modules.projectapi], ModuleCL@c3f76ce[org.netbeans.modules.projectuiapi.base], ModuleCL@40f10af1[org.netbeans.api.progress], ModuleCL@1c18559a[org.netbeans.api.progress.nb], ModuleCL@d5a265a[org.openide.dialogs], ModuleCL@7a24a839[org.openide.nodes], ...527 more]
   at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:224)
   at org.netbeans.ModuleManager$SystemClassLoader.loadClass(ModuleManager.java:779)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
   at java.lang.Class.forName0(Class.java:0)
   at java.lang.Class.forName(Class.java:348)
   at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1874)
   at javax.swing.UIManager.setLookAndFeel(UIManager.java:582)
   at org.bisanti.uieditor.UIEditorTopComponent.loadSettings(UIEditorTopComponent.java:127)
   at org.bisanti.uieditor.Installer$1.run(Installer.java:22)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:709)
   at java.awt.EventQueue$3.run(EventQueue.java:703)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
   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)