I trying to import a Gradle project for XNAT for the first time using Eclipse 2018-12. I created the project, right clicked, chose Gradle then Existing Gradle Project. After the import completed there is an error with SimpleUploadPlugin.java - "The type org.apache.ecs.ConcreteElement cannot be resolved. It is indirectly referenced from required .class files". I have checked and I have the commons-lang3-3.8.1.jar.

What do I need to do to resolve this issue please?

My build.gradle dependencies are:

```
// TODO: This is a pretty minimal set of dependencies, so don't worry if you need to add more.
dependencies {
    implementation("org.nrg.xnat:web") {
        transitive = false
    }
    implementation("org.nrg.xnat:xnat-data-models") {
        transitive = false
    }
    implementation("org.nrg.xdat:core") {
        transitive = false
    }
    implementation "org.nrg:prefs"
    implementation "org.nrg:framework"

    implementation("turbine:turbine") {
        transitive = false
    }
    implementation("org.apache.velocity:velocity") {
        transitive = false
    }
    implementation("stratum:stratum") {
        transitive = false
    }

    implementation "log4j:log4j"
    implementation "io.springfox:springfox-swagger2"

    compile group: 'ecs', name: 'ecs', version: '1.4.2'
}

```