Hello.
Here is the build.gradle:
build.gradle
and there was that at the beginnig of the error :
C:\Users\*************\AppData\Local\*******\mode\forge-1.12.2-14.23.5.2836____1____-mdk>gradlew setupDecompWorkspace
To honour the JVM settings for this build a new JVM will be forked. Please consider using the daemon: https://docs.gradle.org/2.14/userguide/gradle_daemon.html.
FAILURE: Build failed with an exception.