Google Cloud Messaging - Google services sample Gradle unknown error

Question

I have downloaded the Google services sample from here and when I try to run it following the steps about the JSON, then an error pops out. The problem is that the console and the log, shows nothing about this error.

It looks like this.

I have no idea what am I doing wrong but, after this, I can't try to run it again, because the Run button is disabled.

Any idea to solve this?

UPDATE: This is the log in the Gradle Console:

Configuration on demand is an incubating feature.
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:preReleaseBuild UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72211Library UP-TO-DATE
:app:prepareComAndroidSupportMediarouterV72200Library UP-TO-DATE
:app:prepareComAndroidSupportSupportV42211Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServices750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAds750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAnalytics750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAppindexing750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAppinvite750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAppstate750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesBase750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesCast750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesDrive750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesFitness750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesGames750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesGcm750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesIdentity750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesLocation750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesMaps750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesNearby750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesPanorama750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesPlus750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesSafetynet750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesWallet750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesWearable750Library UP-TO-DATE
:app:prepareDebugDependencies
:app:compileDebugAidl UP-TO-DATE
:app:compileDebugRenderscript UP-TO-DATE
:app:generateDebugBuildConfig UP-TO-DATE
:app:generateDebugAssets UP-TO-DATE
:app:mergeDebugAssets UP-TO-DATE
:app:generateDebugResValues UP-TO-DATE
:app:processDebugGoogleServices
No matching client found for package name 'gcm.play.android.samples.com.gcmquickstart'
:app:generateDebugResources
:app:mergeDebugResources UP-TO-DATE
:app:processDebugManifest UP-TO-DATE
:app:processDebugResources UP-TO-DATE
:app:generateDebugSources UP-TO-DATE
:app:processDebugJavaRes UP-TO-DATE
:app:compileDebugJavaWithJavac
:app:compileDebugNdk UP-TO-DATE
:app:compileDebugSources
:app:preDexDebug
:app:dexDebug
AGPBI: {"kind":"simple","text":"Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar ","sources":[{}]}


:app:validateDebugSigning
:app:packageDebug
:app:zipalignDebug
:app:assembleDebug

BUILD SUCCESSFUL

Total time: 19.379 secs

Answer 1

This works for me:

In build.gradle(app) I have

applicationId "com.examples.Activities"

and in google-services.json I have

"package_name": "com.examples"

I changed

"package_name": "com.examples"

to

"package_name": "com.examples.Activities"