Error:Execution failed for task ':app:packageRelease'. > Unable to compute hash of /../AndroidStudioProjects/../classes.jar
I'm trying to do a 'release' build on an Android app and I keep on getting this error of: Unable to compute hash of /../AndroidStudioProjects/../classes.jar And then when I look into that directory for 'classes.jar' the file isn't there. Do I have to create this file myself with a gradle task? There's something going on with proguard here but it's not giving much useful information other than 'Unable to compute hash...." Here's my gradle.build file: apply plugin: 'com.android.application' apply plugin: 'com.google.gms.google-services' android { compileSdkVersion 22 buildToolsVersion "22.0.1"