Network Protocol Error

This mod was created to mitigate frequent disconnects on unstable or misbehaving servers, making it especially useful in those environments

1.8K Downloads

fabricutility

Rent Server with this Mod

About this Mod

"Network Protocol Error" is a disconnection message that you get when the Minecraft: Java Edition client receives malformed or unexpected network packets and forcibly disconnects. This mod was created to mitigate frequent disconnects on unstable or misbehaving servers, making it especially useful in those environments.

While this mod helps with the annoyance of repeated disconnections, it should be used at your own risk. Preventing disconnects may lead to unexpected behavior or minor bugs, so caution is advised.

Available Versions

Network Protocol Error 1.0.0-stable+mc1.21.11release

MC 1.21.11fabric

December 23, 2025

Network Protocol Error 1.0.0-stable+mc1.21.10release

MC 1.21.10fabric

December 23, 2025

How to Install Network Protocol Error on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

Install Mod

Open the mod browser in the dashboard and search for "Network Protocol Error". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.11, 1.21.10

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Network Protocol Error server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is Network Protocol Error compatible with fabric?

Network Protocol Error officially supports fabric for Minecraft 1.21.11, 1.21.10. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Network Protocol Error – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Network Protocol Error consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.