java.lang.IllegalArgumentException: Attempt to remove nonexistent path [nbfs://nbhost/SystemFileSystem/PHP/RuntimeLibraries/;C:\Program Files\NetBeans 8.1 RC2\php\phpstubs\phpruntime] from list of registered paths [[]] for id classpath/php-boot. All paths: {classpath/php-boot=[], classpath/php-project-boot=[], classpath/php-source=[], classpath/javascript-boot=[C:\Program Files\NetBeans 8.1 RC2\ide\jsstubs\corestubs.zip;C:\Program Files\NetBeans 8.1 RC2\ide\jsstubs\domstubs.zip;C:\Program Files\NetBeans 8.1 RC2\ide\jsstubs\reststubs.zip]}
   at org.netbeans.modules.java.classpath.DefaultGlobalPathRegistryImplementation.unregister(DefaultGlobalPathRegistryImplementation.java:118)
   at org.netbeans.spi.java.classpath.GlobalPathRegistryImplementation$AccessorImpl.unregister(GlobalPathRegistryImplementation.java:129)
   at org.netbeans.api.java.classpath.GlobalPathRegistry.unregister(GlobalPathRegistry.java:248)
   at org.netbeans.modules.php.project.PhpProject$PhpOpenedHook.projectClosed(PhpProject.java:892)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectClosed(ProjectOpenedHook.java:89)
   at org.netbeans.modules.project.ui.OpenProjectList.notifyClosed(OpenProjectList.java:1322)
   at org.netbeans.modules.project.ui.OpenProjectList.access$2600(OpenProjectList.java:137)
   at org.netbeans.modules.project.ui.OpenProjectList$14.run(OpenProjectList.java:976)
   at org.openide.util.RequestProcessor$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)