19:45:57 [GRAVE] août 31, 2015 7:45:57 PM io.netty.util.concurrent.SingleThreadEventExecutor runAllTasks
AVERTISSEMENT: A task raised an exception.
java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to java.lang.String
    at net.md_5.bungee.UserConnection.addGroups(UserConnection.java:443)
    at net.md_5.bungee.UserConnection.init(UserConnection.java:167)
    at net.md_5.bungee.connection.InitialHandler$6$1.run(InitialHandler.java:486)
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:380)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357)
    at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
    at java.lang.Thread.run(Thread.java:745)