A server software called CatServer will be used in order to utilize plugins and mods at the same time. You can download CatServer here: https://github.com/Luohuayu/CatServer/releases
Make sure to download the .jar file.

The JAR file will be installed as a custom JAR. How do I use a custom JAR?

Once installed, start your server up.

That's it - the server will download all necessary libraries and files during startup.
Note that CatServer currently only supports 1.12.2. Additionally, it recently added support for Java 11 so if you are using the Java 11 version, you'll want to choose the Custom JAR Java 11 server type instead of the regular Custom JAR server type. The same steps still apply for using a custom JAR on Java 11.
Was this article helpful?
Thank you!