CommandInvokationFailure: Gradle build failed.
F:/Program Files/Unity/2017.4.31f/Editor/Data/PlaybackEngines/AndroidPlayer/Tools\OpenJDK\Windows\bin\java.exe -classpath “F:\Program Files\Unity\2017.4.31f\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\gradle\lib\gradle-launcher-4.6.0.jar” org.gradle.launcher.GradleMain “-Dorg.gradle.jvmargs=-Xmx4096m” “assembleRelease”

Solution：

if there is where in the error message: followed by garbled characters, it means that the path is wrong, and neither the project nor the signature can be in English.