Copy Support Failed for -- Netbeans 8.0.2

I am using Netbeans 8.0.2 with Ubuntu 14.04. I am getting a message like below :

Why this one is coming ? How can I stop it ?

UPDATE

Thanks @WillShakleford for your reply. Here is some of my last few lines of IDE Log.

java.lang.IllegalArgumentException: C:\wamp\www\llsynckers at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj.createFolderImpl(FolderObj.java:240) at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj$2.call(FolderObj.java:324) at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj$2.call(FolderObj.java:322) at org.netbeans.modules.masterfs.filebasedfs.FileBasedFileSystem.runAsInconsistent(FileBasedFileSystem.java:120) at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj.createFolder(FolderObj.java:327) at org.openide.filesystems.FileUtil.createFolder(FileUtil.java:723) at org.openide.filesystems.FileUtil.createFolder(FileUtil.java:480) at org.netbeans.modules.php.project.copysupport.LocalOperationFactory.doCopy(LocalOperationFactory.java:333) at org.netbeans.modules.php.project.copysupport.LocalOperationFactory.access$300(LocalOperationFactory.java:65) at org.netbeans.modules.php.project.copysupport.LocalOperationFactory$2.call(LocalOperationFactory.java:222) at org.netbeans.modules.php.project.copysupport.LocalOperationFactory$2.call(LocalOperationFactory.java:213) [catch] at org.netbeans.modules.php.project.copysupport.CopySupport$ProxyOperationFactory$ProxyHandler.callLocal(CopySupport.java:645) at org.netbeans.modules.php.project.copysupport.CopySupport$ProxyOperationFactory$ProxyHandler.call(CopySupport.java:619) at org.netbeans.modules.php.project.copysupport.CopySupport$ProxyOperationFactory$ProxyHandler.call(CopySupport.java:603) at org.netbeans.modules.php.project.copysupport.CopySupport$3.run(CopySupport.java:162) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)