Help! Exception in thread "main"

18:33:10 [SEVERE] Exception in thread "main"
18:33:10 [SEVERE] java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Map
18:33:10 [SEVERE] at net.md_5.bungee.conf.YamlConfig.getListeners(YamlConfig.java:237)
18:33:10 [SEVERE] at net.md_5.bungee.conf.Configuration.load(Configuration.java:78)
18:33:10 [SEVERE] at net.md_5.bungee.BungeeCord.start(BungeeCord.java:264)
18:33:10 [SEVERE] at...