[21:09:21] [Server thread/INFO] [minecraft/ServerPlayNetHandler]: ***** lost connection: Internal Exception: io.netty.handler.codec.EncoderException: com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $

[21:09:21] [Server thread/INFO] [minecraft/DedicatedServer]: ***** left the game

서버를 접속하려고 하는데 계속 Internal Exception: java.io.ioexception 이런 문구만 뜨고 안들어가지는데 어떻게 해야되나요? ㅠㅠ