Help Im Stuck In The Lvl 9 Dungeon

Hello me and my friends went into the LVL 9 dungeon and we got stuck a one point and it says "internal exception: io.netty.handler.codec.DecoderException: java.io.IOException: Packet 0/36 (ki) was larger than i expected, found 3 bytes extra whilst reading packet 36" does anyone have any ideas to fix it because i join and get kick and it just says this.

 

If you are using a 1.13, Optifine or any wynncraft mods i suggest you turn then all off and use a clean 1.12.2 client. These clients cause some people to crash while playing, so it is not suggested to use them. 1.12.2 is as of right now the most stable client, so it is highly suggested to use it. If you are still experiencing problems after trying this, let me know.

 

Things like these happen often just rejoin there shouldnt be a problem also this is propably a thing caused by 1.13 since I have never seen this happen in any other version anywhere. I suggest just switching to a version between 1.9 and 1.12.2 because they are the most stable on Wynncraft.