Error

when I start my bungeecord server, throw this error and let me do nothing but stop the server bungeecord
[m[2K02:22:21 [SEVERE] Exception in thread "main" [m[2K02:22:21 [SEVERE] java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to java.lang.String [m[2K02:22:21 [SEVERE] at net.md_5.bungee.util.CaseInsensitiveHashingStrategy.computeHashCode(CaseInsensitiveHashingStrategy.java:13) [m[2K02:22:21 [SEVERE] at...

Error