Question 1

Does Rubius Cobblemon work on Minecraft 1.21.1?

Accepted Answer

Yes. 1.21.1 is the newest Minecraft version Rubius Cobblemon declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Question 2

Do I need to install Rubius Cobblemon on the client or the server?

Accepted Answer

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

Question 3

Which loader does Rubius Cobblemon need?

Accepted Answer

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

Question 4

Which Java version do I need for Rubius Cobblemon?

Accepted Answer

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the modpack itself.

Question 5

What licence is Rubius Cobblemon under?

Accepted Answer

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

Question 6

How do I install Rubius Cobblemon?

Accepted Answer

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

Question 7

Where do I download Rubius Cobblemon safely?

Accepted Answer

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Rubius Cobblemon

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Minecraft versions

Frequently asked