MixinGradle does not create Refmap

I’m trying to use MixinGradle together in Forge reobfuscate. The project is successfully building, but file “mixins.scring.refmap.json” don’t create.

Gradle Wrapper version: Gradle 4.4.1
This my build.gradle: https://pastebin.com/SYHWZDvH
Log on build task: https://pastebin.com/raw/dUx2kDms
Log on assemble task: https://pastebin.com/raw/s8jKvv81