Hi,
when i add to project cordova-plugin-admob-free and build release apk i got warning when veryfi signed apk and apk not working. Debug is fine
Warning:
WARNING: META-INF/services/com.google.protobuf.GeneratedExtensionRegistryLoader not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/.
Ionic info:
Ionic:
ionic (Ionic CLI) : 4.1.2
Ionic Framework : ionic-angular 3.9.2
@ionic/app-scripts : 3.2.0
Cordova:
cordova (Cordova CLI) : 8.0.0
Cordova Platforms : android 7.0.0
Cordova Plugins : cordova-plugin-ionic-keyboard 2.0.5, cordova-plugin-ionic-webview 2.1.3, (and 8 other plugins)
System:
Android SDK Tools : 26.1.1 (D:\AndroidSDK)
NodeJS : v8.11.4 (C:\Program Files\nodejs\node.exe)
npm : 5.6.0
OS : Windows 7
Plugin section:
<plugin name=“cordova-plugin-device” spec="^1.1.4" />
<plugin name=“cordova-plugin-inappbrowser” spec="^1.7.2" />
<plugin name=“cordova-plugin-ionic-webview” spec="^1.1.11" />
<plugin name=“cordova-plugin-nativestorage” spec="^2.2.2" />
<plugin name=“cordova-plugin-splashscreen” spec="^4.0.3" />
<plugin name=“cordova-plugin-whitelist” spec="^1.3.1" />
<plugin name=“cordova-plugin-x-socialsharing” spec="^5.2.1" />
<plugin name=“cordova-plugin-admob-free” spec="^0.12.1" />
<engine name=“android” spec=“7.0.0” />
Please help me 
Thanks.