How to fix "Couldn't detect jar version"
⚙️How to fix "Couldn't detect jar version"
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Minecraft servers require specific Java versions to run correctly.
Our system attempts to automatically select the best version, but in some cases, you may need to manually override it.
🛠️ How to Manually Override the Java Version
Log into the Control Panel.
Open your server view and click on the Files tab.
Delete the file named disable_prompt_for_java_version.
Go to the Console tab and start your server.
After starting, you will be prompted to select a Java version.
Type the option number based on the Minecraft version you're running, using the table below:
📋 Java Version Selection Table
| 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 |
Once you select the correct Java version, your server will continue booting normally using the appropriate runtime!
Updated on: 25/04/2025
Thank you!