The Sdk is very old. Just follow the installation steps of how to install B4A on the product page here and reinstall the sdk. Then check the google play services in the sdk manager and it will download it.
In Android SDK-Manager be sure that the "Android SDK Build-tools" 25.x.x is installed! Deinstall all versions prior to version 25! If you leave older versions than 23.0.3 of build tools installed, your compiled app may work on Android 5.0 and above but it will fail on older Android versions like KitKat.