Sanraol

Hello everyone, so here I created a small personal Modpack to play with friends all the mods work well solo, but as soon as I try to enter my server it tells me this error, I got nice looking I haven't seen anyone else with the same error, if you could help me that would be really nice. internal exception: io.netty.handler.codec.decoderexception: java.lang.indexoutofboundsexception: index: 16, length: 105 (expected: range(0, 104))