pixelmon isn’t working

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    Whenever i try going into Pixelmon it says- “internal exception: io.netty.handler.codec.DecoderException:java.io.IOException: Bad packet id 25”

    How can i fix this problem? My aternos username is “terfulrug” and my ingame username is “tearfullruglol”.

    did you selected "a specific version" then use the drop down menu to select 1.16(9.0.0) of the modpack?

    Edited once, last by Powerful845tiger ().