Gradle build fails: Could not find org.ajoberstar.grgit:grgit-core

[nhasbun]

Recently I was trying to test out the features of this project and I found the following issue:

A problem occurred configuring root project 'tilesfx'.
> Could not resolve all artifacts for configuration ':classpath'.
   > Could not find org.ajoberstar.grgit:grgit-core:4.0.1.
     Searched in the following locations:
       - https://jcenter.bintray.com/org/ajoberstar/grgit/grgit-core/4.0.1/grgit-core-4.0.1.pom
       - https://plugins.gradle.org/m2/org/ajoberstar/grgit/grgit-core/4.0.1/grgit-core-4.0.1.pom
     Required by:
         project : > org.kordamp.gradle.java-project:org.kordamp.gradle.java-project.gradle.plugin:0.42.1 > org.kordamp.gradle:java-project-gradle-plugin:0.42.1 > org.kordamp.gradle:project-gradle-plugin:0.42.1 > org.kordamp.gradle.build-info:org.kordamp.gradle.build-info.gradle.plugin:0.42.1 > org.kordamp.gradle:buildinfo-gradle-plugin:0.42.1 > gradle.plugin.net.nemerosa:versioning:2.14.0
   > Could not find org.codehaus.groovy.modules.http-builder:http-builder:0.7.2.
     Searched in the following locations:
       - https://jcenter.bintray.com/org/codehaus/groovy/modules/http-builder/http-builder/0.7.2/http-builder-0.7.2.pom
       - https://plugins.gradle.org/m2/org/codehaus/groovy/modules/http-builder/http-builder/0.7.2/http-builder-0.7.2.pom
     Required by:
         project : > org.kordamp.gradle.java-project:org.kordamp.gradle.java-project.gradle.plugin:0.42.1 > org.kordamp.gradle:java-project-gradle-plugin:0.42.1 > org.kordamp.gradle:project-gradle-plugin:0.42.1 > org.kordamp.gradle.coveralls:org.kordamp.gradle.coveralls.gradle.plugin:0.42.1 > org.kordamp.gradle:coveralls-gradle-plugin:0.42.1 > gradle.plugin.org.kt3k.gradle.plugin:coveralls-gradle-plugin:2.10.2
   > Could not find org.codehaus.groovy.modules.http-builder:http-builder:0.7.2.
     Searched in the following locations:
       - https://jcenter.bintray.com/org/codehaus/groovy/modules/http-builder/http-builder/0.7.2/http-builder-0.7.2.pom
       - https://plugins.gradle.org/m2/org/codehaus/groovy/modules/http-builder/http-builder/0.7.2/http-builder-0.7.2.pom
     Required by:
         project : > org.kordamp.gradle.java-project:org.kordamp.gradle.java-project.gradle.plugin:0.42.1 > org.kordamp.gradle:java-project-gradle-plugin:0.42.1 > org.kordamp.gradle:project-gradle-plugin:0.42.1 > org.kordamp.gradle.bintray:org.kordamp.gradle.bintray.gradle.plugin:0.42.1 > org.kordamp.gradle:bintray-gradle-plugin:0.42.1 > com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.5

Possible solution:
 - Declare repository providing the artifact, see the documentation at https://docs.gradle.org/current/userguide/declaring_repositories.html

I guess it's related to the missing jcentral repository. Would be nice to see an update.