ERROR: io.netty.handler.codec.DecoderException: java.lang.NullPointerException

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1st Official Post

    Hello everybody!


    I write you today because I have an error on my map, and I don't know how to fix it.


    Where I reach a precise area of my map, I'm disconnected from my server and the game displays this error.

    Image


    Here are the game details:

    - Edition: Java

    - Version: 1.17 pre-release 4


    My map was working before the pre-release 3, and it works perfectly in single-player mode. How can I fix it ?


    Thanks in advance.

    This is a bug (MC-227065)


    The only way to fix it is downgrading to Pre-Release 2, however it is not available on Aternos. I requested for them to add it but no response (it's okay i know you guys work hard). It cannot be fixed.

    • Official Post

    Try generating a new world. If you want to keep your world you have to wait until Mojang provides a new release with a fix.

    Snapshots are development builds of Minecraft that contain new and untested changes, therefore it's not recommended to use it for active playing.

  • Roman

    Closed the thread.