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NullPointer Fix for MioMinecraft mod for 1.21.11

This mod safely fixes the null pointer issue in Minecraft network packets.

client and servernewest supported 1.21.11TechnologyUtility
Latest version
1.0-1.21
Minecraft
1.19.2 to 1.21.11
Java
Java 21+
Loaders
NeoForge, Forge
Licence
MIT
Downloads
14.5k
Updated
4 mo ago
Available on
Modrinth
Space NodeOur hosting

Host NullPointer Fix for Mio servers

One click and NullPointer Fix for Mio is installed with the right loader, on hardware built for it.

  • 1.21.11
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version NullPointer Fix for Mio declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.11NeoForge, Forge21+declared9 Dec 2025
1.21.10NeoForge, Forge21+declared7 Oct 2025
1.21.9Forge, NeoForge21+declared30 Sept 2025
1.21.8NeoForge, Forge21+declared17 Jul 2025
1.21.7Forge, NeoForge21+declared30 Jun 2025
1.21.6NeoForge, Forge21+declared17 Jun 2025
1.21.5NeoForge, Forge21+declared25 Mar 2025
1.21.4Forge, NeoForge21+declared3 Dec 2024
1.21.3NeoForge, Forge21+declared23 Oct 2024
1.21.2NeoForge, Forge21+declared22 Oct 2024
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.21NeoForge, Forge21+declared13 Jun 2024
1.20.6NeoForge, Forge21+declared29 Apr 2024
1.20.5Forge, NeoForge21+declared23 Apr 2024
1.20.4NeoForge, Forge17+declared7 Dec 2023
1.20.3NeoForge, Forge17+declared4 Dec 2023
1.20.2NeoForge, Forge17+declared20 Sept 2023
1.20.1NeoForge, Forge17+declared12 Jun 2023
1.19.4NeoForge, Forge17+declared14 Mar 2023
1.19.3NeoForge, Forge17+declared7 Dec 2022
1.19.2NeoForge, Forge17+declared5 Aug 2022

Download

From NullPointer Fix for Mio’s own host. Nothing is re-hosted here.

1.0-1.21release12 Jun 2026

nullpointerfixformio-1.21.x.jar · 3 KB · for 1.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +7 more

Download latest
00a4026e004a…
Older versions2
  • 1.0-1.2012 Jun 20261.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more4 KB18.0k downloadsf62c125bfc17…Get
  • 1.1-1.1912 Jun 20261.19.4, 1.19.3, 1.19.25 KB132 downloadsa8a94dce2f8d…Get

Frequently asked

Does NullPointer Fix for Mio work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version NullPointer Fix for Mio declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does NullPointer Fix for Mio support?

Everything the author has declared, from 1.19.2 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install NullPointer Fix for Mio on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does NullPointer Fix for Mio support?

NeoForge, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for NullPointer Fix for Mio?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is NullPointer Fix for Mio under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install NullPointer Fix for Mio?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download NullPointer Fix for Mio safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Details from Modrinth, where the author last updated it on 12 Jun 2026. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .