Bug? Android Gradle rungradle.bat" :app:assembleDebug

About error on shipping.
I do not know if I can contribute, but I was able to solve it.
I will explain how to do it.

1.Activating “gradlew.bat” in C: / Program File / Epic Games / UE_4.18 / Engine / Build / Android / Java / gradle works OK if .gradle is created.
2.However, if it is not created, open “build.gradle”, add “//” before “apply from: 'baseBuildAdditions.gradle” and close it.
3.Once again open “gradlew.bat” and it is OK if the file has been created.
4.Finally, delete “//” in “build.gradle”. You can build with this.

Although it is possible to build, the stepwise build version is over 14. Therefore, my terminal is under version 14 of the SDK and can not handle it. Did you add version 14 API on Epic side? I want to correspond to version 14 or lower, what should I do?

This is resolve.

how ???

Could you tell me how to resolve it? I am stuck in the same problem.