How to fix "Couldn't detect jar version"
How to fix "Couldn't detect jar version"
Minecraft Servers require specific Java versions to run correctly, our system attempts to automatically determine which version to run with, however, isn't always successful. You can manually override this setting.
How to manually override the Java version
Log into our control panel
Open your server view, go into your server's Files tab
Delete the disable_prompt_for_java_version file
Go to the Console tab and start up the server again.
You will be prompted to select a Java version, depending on the Minecraft version you're running, select a version by typing the option number in the Console. You can see the correct version from the table below:
| Minecraft Version | Option | Java Version |
|---|---|---|
| Forge / Fabric 1.16 and below | 2 | Java 8 |
| Vanilla 1.16 and below | 3 | Java 11 |
| Paper / spigot 1.16 and below | 3 | Java 11 |
| Bungeecord / Waterfall | 3 | Java 11 |
| Vanilla 1.17 and above | 4 | Java 16 |
| Paper / spigot 1.17 and above | 4 | Java 16 |
| Forge / Fabric 1.17 and above | 4 | Java 16 |
| Vanilla 1.18 and above | 5 | Java 17 |
| Paper / Spigot 1.18 and above | 5 | Java 17 |
| Forge / Fabric 1.18 and above | 5 | Java 17 |
| Vanilla 1.20.5 and above | 6 | Java 21 |
| Paper / Spigot 1.20.5 and above | 6 | Java 21 |
| Forge / Fabric 1.20.5 and above | 6 | Java 21 |
Updated on: 07/06/2024
Thank you!