BungeeCord Exception when Starting Server.

09:13:03 [INFO] Enabled BungeeCord version git-BungeeCord-Proxy-1.6.2-SNAPSHOT-"db5a147"-621
09:13:03 [SEVERE] Exception in thread "main"
09:13:03 [SEVERE] java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to java.util.Collection
09:13:03 [SEVERE]     at net.md_5.bungee.config.YamlConfig.getListeners(YamlConfig.java:187)
09:13:03 [SEVERE]     at net.md_5.bungee.config.Configuration.load(Configuration.java:56)
09:13:03 [SEVERE]     at net.md_5.bungee.BungeeCord.start(BungeeCord.java:239)
09:13:03 [SEVERE]     at net.md_5.bungee.BungeeCord.main(BungeeCord.java:184)