Startup Issue with Minecraft - Modded Minecraft server fails to start

Technical Support
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5

Alright, it looks like the error is related to the version of Java you’re using. Your log mentions that the mod ‘create.mixins.json’ needs a class version higher than what Java 16 supports.

Here’s what you can do:

  1. Upgrade Java: Ensure you have a version of Java installed that supports class version 61. Java 17 or above should work fine.

    On AMP, you can install new Java versions with this command:

    getamp installJava

    This will install all relevant Java versions.

  2. Set the Correct Java Version in AMP:

    • Go to your Minecraft instance in the AMP web interface.
    • Use the search box to find “Java” settings.
    • Change the Java version to the one you just installed.

Once you’ve done this, try starting your server again.

Let me know if you need more steps or run into any spoilers along the way!

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