Bungee_Error

# java -Xss192k -Xmx1G -jar BungeeCord.jar
03:36:31 [INFO] Enabled BungeeCord version git-BungeeCord-Proxy-1.4.7-SNAPSHOT-"a8c6018"-187
Exception in thread "main" java.lang.IllegalArgumentException
        at com.google.common.base.Preconditions.checkArgument(Preconditions.java:76)
        at net.md_5.bungee.config.Configuration.load(Configuration.java:87)
        at net.md_5.bungee.BungeeCord.start(BungeeCord.java:157)
        at net.md_5.bungee.BungeeCord.main(BungeeCord.java:129)