Internal exception java.IOException Received string length longer than maximum allowed (9366 > 64)

Hello, my server randomly just started giving players, including myself, the foll0wing error on log in: "internal exception java.ioexception received string length longer than maximum allowed (9366 > 64)"

I did some research but didn't really find anything. I found something that said it was an entity in a chunk that had more than 16 characters, but didn't find any way to solve the problem, and it didn't make any sense.

So any help would be wonderful! Thanks,
Christopher, EternalMine Founder.

EternalMine.enjin.com/​