unity ads Advertisement.IsReady(placementId) always false

I already work the Unity Ads before. When I export the Android project and use the gradle to build, I cannot show the ads. I make sure the gameID and placementID is correct. My game is launched on the play store. That version is work.

Does anybody know why I get false?

// GENERATED BY UNITY. REMOVE THIS COMMENT TO PREVENT OVERWRITING WHEN EXPORTING AGAIN

buildscript {

   repositories {

      jcenter()

   }



   dependencies {

      classpath 'com.android.tools.build:gradle:2.3.0'

   }

}



allprojects {

   repositories {

      flatDir {

        dirs 'libs'

      }

   }

}



apply plugin: 'com.android.application'



dependencies {

   compile fileTree(include: ['*.jar'], dir: 'libs')

   compile 'com.android.support:multidex:1.0.1'

    compile project(':fabric-init')

    compile project(':fabric')

    compile project(':crashlytics')

    compile project(':crashlytics-wrapper')

    compile project(':answers')

    compile project(':beta')

    compile project(':Firebase')

   compile project(':OneSignalConfig')

   compile project(':SuperAwesome_lib')

    compile project(':unity-android-resources')

    compile files('libs/unity-classes.jar')

    compile(name: 'common', ext: 'aar')

    compile(name: 'GoogleAIDL', ext: 'aar')

    compile(name: 'GooglePlay', ext: 'aar')

   compile(name: 'Helpshift', ext: 'aar')

   compile(name: 'com.android.support.animated-vector-drawable-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.appcompat-v7-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.cardview-v7-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.customtabs-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.design-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.recyclerview-v7-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.support-compat-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.support-core-ui-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.support-core-utils-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.support-fragment-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.support-media-compat-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.support-v4-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.support-vector-drawable-27.1.1', ext: 'aar')

   compile(name: 'com.android.support.transition-27.1.1', ext: 'aar')

   compile(name: 'android.arch.core.runtime-1.1.0', ext: 'aar')

   compile(name: 'android.arch.lifecycle.livedata-core-1.1.0', ext: 'aar')

   compile(name: 'android.arch.lifecycle.runtime-1.1.0', ext: 'aar')

   compile(name: 'android.arch.lifecycle.viewmodel-1.1.0', ext: 'aar')

   compile(name: 'UnityAds', ext: 'aar')

    compile(name: 'com.google.android.gms.play-services-base-12.0.1', ext: 'aar')

    compile(name: 'com.google.android.gms.play-services-base-license-12.0.1', ext: 'aar')

    compile(name: 'com.google.android.gms.play-services-basement-12.0.1', ext: 'aar')

    compile(name: 'com.google.android.gms.play-services-basement-license-12.0.1', ext: 'aar')

    compile(name: 'com.google.android.gms.play-services-location-12.0.1', ext: 'aar')

    compile(name: 'com.google.android.gms.play-services-location-license-12.0.1', ext: 'aar')

    compile(name: 'com.google.android.gms.play-services-tasks-12.0.1', ext: 'aar')

    compile(name: 'com.google.android.gms.play-services-tasks-license-12.0.1', ext: 'aar')

    compile(name: 'com.google.firebase.firebase-common-12.0.1', ext: 'aar')

    compile(name: 'com.google.firebase.firebase-common-license-12.0.1', ext: 'aar')

    compile(name: 'com.google.firebase.firebase-iid-12.0.1', ext: 'aar')

    compile(name: 'com.google.firebase.firebase-iid-license-12.0.1', ext: 'aar')

    compile(name: 'com.google.firebase.firebase-messaging-12.0.1', ext: 'aar')

    compile(name: 'com.google.firebase.firebase-messaging-license-12.0.1', ext: 'aar')

   compile(name: 'installreferrer-1.0', ext: 'aar')

    compile(name: 'onesignal-unity', ext: 'aar')

    compile(name: 'com.google.android.gms.play-services-iid-12.0.1', ext: 'aar')

}



android {

   compileSdkVersion 26

   buildToolsVersion '26.0.1'



   defaultConfig {

      targetSdkVersion 26

      applicationId 'com.animocabrands.google.beastquesttd'

      multiDexEnabled true

   }



   lintOptions {

      abortOnError false

   }



   aaptOptions {

      noCompress '.unity3d', '.ress', '.resource', '.obb'

   }



   signingConfigs {

        release {

            storeFile file("xxxx")

            storePassword 'xxxx'

            keyAlias 'xxx'

            keyPassword 'xxxx'

        }

    }



   buildTypes {

         debug {

            jniDebuggable true

         }

         release {

            // Set minifyEnabled to true if you want to run ProGuard on your project

            minifyEnabled true

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'

            signingConfig signingConfigs.release

         }

      }

}

 

As was mentioned, please provide the device logs https://forum.unity.com/threads/how-to-capturing-device-logs-on-android.528680/ . Also, ensure to place appropriate Debug.Log statements in your code to output the values of the relevant runtime variables and return codes. Debug.Log statements will show in the device logs on Android.