Execution failed for task ':app:processDebugGoogleServices'. > Please fix the version conflict either by updating the version of the google-services plugin.... version of com.google.android.gms to 11.8.0

Open the project.properties file located at platforms/android/

Find the following line there:
com.google.android.gms:play-services

Check if there any version mismatch or have any + to those lines:
Change those conflicts or +'s with your desired version. Say :: 11.8.0

See there is a version mismatch:

So, I changed this to:

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Is this a tutorial for others to follow or did you forget including your question?

This will help others

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im still getting the error even if i changed them to same versions

compile “com.google.android.gms:play-services-auth:11.8.0”
compile “com.google.android.gms:play-services-identity:11.8.0”
compile “com.google.firebase:firebase-core:11.8.0”
compile “com.google.firebase:firebase-messaging:11.8.0”

Open the project.properties file

make the version of play-services as firebase

The version that you need to set for each one (usually) need to be as this link: https://firebase.google.com/support/release-notes/android#latest_sdk_versions

Source: https://firebase.google.com/support/releases

This is work for me tray it.

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