ERROR

Used for critical misconfigurations that need immediate addressing.

Heavily emphasized in the output (intuition: bold red highlighting).

ATTENTION: If a diagnostic with this severity is reported, Kotlin compiler will not be invoked (build will appear failed, as with compilation error).

However, Gradle IDE Sync and other tasks that are not connected with any of the Kotlin Compiler and tools (e.g. 'help', 'clean'), will run successfully.