Hello,
First screenshot: Unity is complaining that the Android APIs in “targetSdkVersion”, which is something set in a Manifest file, are different (I see 23, 24, and 25) across your Manifests. I’d check to make sure that they all target the same Android API number.
Second screenshot: Make sure you import Google Play services to your Unity project. Once imported, check your Manifest. You should be able to see the meta-data tag containing “@integer/google_play_services_version”.