java.io.IOException: Project folder is not writeable.
   at org.netbeans.api.project.ProjectManager.saveProject(ProjectManager.java:699)
   at org.netbeans.modules.web.project.ui.customizer.WebProjectProperties$7.run(WebProjectProperties.java:949)
   at org.openide.util.Mutex.postRequest(Mutex.java:1271)
   at org.openide.util.Mutex.postWriteRequest(Mutex.java:592)
   at org.netbeans.modules.web.project.ui.customizer.WebProjectProperties.setServerInstance(WebProjectProperties.java:938)
   at org.netbeans.modules.web.project.WebProject$ProjectOpenedHookImpl.projectOpened(WebProject.java:1006)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:85)
   at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectOpened(UILookupMergerSupport.java:244)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:85)
   at org.netbeans.modules.project.ui.OpenProjectList.notifyOpened(OpenProjectList.java:1298)
   at org.netbeans.modules.project.ui.OpenProjectList.doOpenProject(OpenProjectList.java:1379)
   at org.netbeans.modules.project.ui.OpenProjectList.open(OpenProjectList.java:823)
   at org.netbeans.modules.project.ui.OpenProjectList$6.run(OpenProjectList.java:675)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)