kaptDebugKotlin task error: Unable to build the project

[philipbrito]

When updating the android-ktx version to 0.2 I'm unable to build my project. The following output is show:

Error:Execution failed for task ':app:kaptDebugKotlin'.

There is no problem when using the version 0.1.

[JakeWharton]

This library is not an annotation processor and there's not enough information to diagnose any kind of problem. Please create a standalone sample that demonstrates the problem when the core-ktx artifact version is changed from 0.1 to 0.2 and we can take a look.

[philipbrito]

@JakeWharton It was not really a library issue, but it was interesting that when working with the 0.1 version I got no problem, but when upgrading the lib to the 0.2 this issue comes on.

I have the newest JRE installed (9.0.4) and the gradle version is 4.6.
Looking on my two gradle-wrapper.properties files the distributionUrl was setted up with the distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip value, so I had to change it to distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip (see discussion here and here for more info).
When trying to build the project I got an Error:Could not initialize class com.android.sdklib.repositoryv2.AndroidSdkHandler, and to fix it I had to specify the JAVA_HOME` environment variable with the ones that is bundled with the Android Studio (more info here).

I do not know why this problem comes when the android-ktx version is updated, but I hope that the discussion here can help someone facing the same trouble.