If your game is on the Huawei Platform kindly add the following lines in Assets -> ConsoliAdsSDK -> Editor -> ConsoliAdsSDKDependencies.xml under the androidPackages
:
<androidPackage spec="com.huawei.hms:push:4.0.3.301"> <repositories> <repository>http://developer.huawei.com/repo/</repository> </repositories> </androidPackage>
After adding the following lines run the play services resolver. Go to Menu->Assets->Play Services Resolver -> Force Resolve.