java.lang.NoSuchMethodError: org.netbeans.modules.web.common.api.CssPreprocessors.createProjectProblemsProvider(Lorg/netbeans/api/project/Project;)Lorg/netbeans/spi/project/ui/ProjectProblemsProvider;
   at org.netbeans.modules.web.project.WebProject.createLookup(WebProject.java:668)
   at org.netbeans.modules.web.project.WebProject.<init>(WebProject.java:451)
   at org.netbeans.modules.web.project.WebProjectType.createProject(WebProjectType.java:86)
Caused: java.lang.reflect.InvocationTargetException
   at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:0)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:497)
Caused: java.lang.IllegalArgumentException: java.lang.reflect.InvocationTargetException
   at org.netbeans.modules.project.ant.AntBasedGenericType.createProject(AntBasedGenericType.java:140)
   at org.netbeans.modules.project.ant.AntBasedProjectFactorySingleton.loadProject(AntBasedProjectFactorySingleton.java:264)
   at org.netbeans.modules.projectapi.nb.NbProjectManager.createProject(NbProjectManager.java:401)
   at org.netbeans.modules.projectapi.nb.NbProjectManager.access$300(NbProjectManager.java:94)
   at org.netbeans.modules.projectapi.nb.NbProjectManager$2.run(NbProjectManager.java:314)
   at org.netbeans.modules.projectapi.nb.NbProjectManager$2.run(NbProjectManager.java:243)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.readAccess(DefaultMutexImplementation.java:252)
   at org.openide.util.Mutex.readAccess(Mutex.java:250)
   at org.netbeans.modules.projectapi.nb.NbProjectManager.findProject(NbProjectManager.java:243)
   at org.netbeans.api.project.ProjectManager.findProject(ProjectManager.java:167)
   at org.netbeans.modules.projectapi.SimpleFileOwnerQueryImplementation.getOwner(SimpleFileOwnerQueryImplementation.java:161)
   at org.netbeans.api.project.FileOwnerQuery.getOwner(FileOwnerQuery.java:116)
   at org.netbeans.modules.java.project.ProjectClassPathProvider.findClassPath(ProjectClassPathProvider.java:68)
   at org.netbeans.api.java.classpath.ClassPath.getClassPath(ClassPath.java:676)
   at org.netbeans.modules.debugger.jpda.projects.SourcePathProviderImpl.getSourceRoot(SourcePathProviderImpl.java:809)
   at org.netbeans.modules.debugger.jpda.SourcePath$CompoundContextProvider.getSourceRoot(SourcePath.java:438)
   at org.netbeans.modules.debugger.jpda.SourcePath$CompoundContextProvider.getSourceRoot(SourcePath.java:440)
   at org.netbeans.modules.debugger.jpda.SourcePath.getSourceRoot(SourcePath.java:139)
   at org.netbeans.modules.debugger.jpda.breakpoints.LineBreakpointImpl.<init>(LineBreakpointImpl.java:150)
   at org.netbeans.modules.debugger.jpda.breakpoints.BreakpointsEngineListener.createBreakpointImpl(BreakpointsEngineListener.java:343)
   at org.netbeans.modules.debugger.jpda.breakpoints.BreakpointsEngineListener.createBreakpointImpls(BreakpointsEngineListener.java:285)
   at org.netbeans.modules.debugger.jpda.breakpoints.BreakpointsEngineListener.propertyChange(BreakpointsEngineListener.java:144)
   at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:328)
   at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.firePropertyChange(JPDADebuggerImpl.java:2240)
   at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.setState(JPDADebuggerImpl.java:2224)
   at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.setRunning(JPDADebuggerImpl.java:1325)
   at org.netbeans.modules.debugger.jpda.actions.StartActionProvider.doStartDebugger(StartActionProvider.java:202)
   at org.netbeans.modules.debugger.jpda.actions.StartActionProvider.access$200(StartActionProvider.java:80)
   at org.netbeans.modules.debugger.jpda.actions.StartActionProvider$1.run(StartActionProvider.java:165)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)