Bug: can't import and build sample

[AndroidDeveloperLB]

First it showed a problem with "com.vanniktech:gradle-maven-publish-plugin" , so I've updated it to :

classpath 'com.vanniktech:gradle-maven-publish-plugin:0.18.0'

Then it showed a problem with:

apply plugin: 'com.vanniktech.maven.publish'

So I've commented it, and then it showed a different issue (of "project.groupid"). Then for some reason, after closing the project and re-opening it, it succeeded building.

Please make the sample be able to be built easily... :(