org.gradle.api.JavaVersion contains:
VERSION_1_9
https://docs.gradle.org/current/javadoc/org/gradle/api/JavaVersion.html#VERSION_1_9
It should be VERSION_9
org.gradle.api.JavaVersion contains:
VERSION_1_9
https://docs.gradle.org/current/javadoc/org/gradle/api/JavaVersion.html#VERSION_1_9
It should be VERSION_9