Unable to add a dependency.

[harley-codes]

Trying to implement org.jetbrains:annotations into the project but builds fail. Not sure if this is an issue with the project template, or something else.

I add the dependency in build.gradle.kts - have tried compileOnly, implementation, and annotationProcessor option.

dependencies {
    // Hytale Server API (provided by server at runtime)
    compileOnly(files("./libs/HytaleServer.jar"))
    compileOnly("org.jetbrains:annotations:26.0.2")

error: package org.jetbrains.annotations does not exist
import org.jetbrains.annotations.Nullable;