android studio map activity and gradle -

i'm trying use map activity in android studio should work straight away. have error message on sync.

if click update button changes version in gradle build file other error.

version 5.6.4 doesn't exist.

the highest version 2.3.1

https://jcenter.bintray.com/com/android/tools/build/gradle/2.3.1/

this seems unsolvable problem.