I have had no luck.
I created a second server and changed profile to : spigot build tools-latest and then on Java settings I did the same build-tools.jar
When you click start nothing happens.
Am I missing some steps here. Thanks.
Buildtools.jar is not a server file, it is a file that makes a server file.
After downloading the latest buildtoos on the spigot/craftbukkit page of MineOS, you would normally pres the “build spigot” button beside the version you want. Unfortunately there is a minor error there that makes that not work. Workaround here: [resolved] Building Spigot / Craftbukkit fails - solution: update WebUI