SenpaiKun

I have been having weird problems with technic recently and honestly have ran out of ideas at this point, my problem is that whenever i tried to join a server on technic i was greeted with this message: Internal Exception: io.netty.handler.codec.EncoderExeption:java.lang.OutOfMemoryError and whenever i start a solo world it just crashes and sends me back to launcher. How can i fix this?