[cordova+visual studio] problema con admob

[Sam111]

voglio usare Admob nel mio progetto Cordova
quindi ho installato il plugin admob


poi ho aggiornato l'SDK dell'android

ma quando compilo, mi restituisce l'errore:

Could not find any matches for com.google.android.gmslay-services-ads

ecco l'output

1>MSBUILD : cordova-build error : FAILURE: Build failed with an exception. 1>MSBUILD : cordova-build error : * What went wrong: 1>MSBUILD : cordova-build error : A problem occurred configuring root project 'android'. 1>MSBUILD : cordova-build error : > Could not resolve all dependencies for configuration ':_debugCompile'. 1>MSBUILD : cordova-build error : > Could not find any matches for com.google.android.gmslay-services-ads:+ as no versions of com.google.android.gmslay-services-ads are available. 1>MSBUILD : cordova-build error : Searched in the following locations: 1>MSBUILD : cordova-build error :