I\'m trying to update a project to Android Studio 3.
The following snippet is no longer accepted in a build.gradle file.
applicationVariants.all { varian         
        
If your failing plugin support explicitly setting file path, it might be a work around.
I had problems with Fabrics crashlyticsUploadDistributionRelease task, giving me the same stack trace as above. I fixed it by explicitly setting the output file path property in  app/build.gradle:
ext.betaDistributionApkFilePath = "app/build/outputs/apk/release/app-release.apk"