BungeeCord

Could not register logger!
java.io.IOException: Couldn't get lock for proxy.log
        at java.util.logging.FileHandler.openFiles(FileHandler.java:389)
        at java.util.logging.FileHandler.<init>(FileHandler.java:363)
        at net.md_5.bungee.log.BungeeLogger.<init>(BungeeLogger.java:30)
        at net.md_5.bungee.BungeeCord.<init>(BungeeCord.java:219)
        at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:53)
        at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15)

I dalej nic ...