Incompatible Java Version

Troubleshooting Java Version Errors

Vanilla

1. Download JDK 21 from any of the links below

   1. https://adoptium.net/temurin/releases?version=21&os=any&arch=any

   2. https://www.oracle.com/java/technologies/downloads/#java21

2. Either refresh the app by pressing ctrl + r or restart the app by fully closing it (ensure you close it from your tray as well)

3. Now when setting up the server, on Step 1 - The Java Selection Step, select the newly downloaded Java 21 from the list

Still not seeing it?

Restart the app again or manually select the FOLDER that you downloaded the java in

1. Now click launch server again!

Still receiving what looks like Java errors? Create a ticket using the #support-ticket channel in our discord

Paper

Excerpt from Paper's Docs

Fabric

Determining Which Java Version to Run

Minecraft Version	Java Version
1.17 - 1.20.4	Java 17
1.20.5 and higher	Java 21

Selected Modpack From App

The only supported java version for pre made modpacks are Java 8, Java 16, Java 17, and Java 21

Still having issues? First consult the fabric documentation below then open a ticket using #support-ticket channel in our discord

Official Fabric Docs

• Windows: https://docs.fabricmc.net/players/installing-java/windows

• Mac: https://wiki.fabricmc.net/player:tutorials:java:mac

• Linux: https://docs.fabricmc.net/players/installing-java/linux