When building for the iOS platform, you might encounter the following issue, which refers to the CocoaPods version that Play Services Revolver is using:
[!] `GoogleAppMeasurement` requires CocoaPods version `>= 1.10.2`, which is not
satisfied by your current version, `1.10.0`.
To resolve this issue, go to Assets > PlayServicesResolver > iOS Resolver > Install Cocoapods, and a popup will indicate which CocoaPods location the Play Services Resolver is using. Ensure that you successfully update the version of that CocoaPods executable.
For more information, see the Unity Mediation documentation.