Ads are not getting served! in andriod

[hackrx]

Hi there Inmobi team, I was trying to test the InMobi integration first, then I cloned this repo and tried interstitial ad example, but it is not working as expected, on clicking of Load AD button, onAdLoadSuceed should be called, which makes Show AD button visible, but it is showing below error:

My placement ID is : 1622978368011
My account ID is: 49c9360f99c344d9bac1b52c44886479
Module app gradle file:

plugins {
    id 'com.android.application'
}

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.3"

    defaultConfig {
        applicationId "com.example.testapp"
        minSdkVersion 16
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"
        multiDexEnabled true

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'com.google.android.material:material:1.3.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
    testImplementation 'junit:junit:4.+'
    //for ads 3
    implementation 'com.inmobi.monetization:inmobi-ads:9.1.9'
    implementation 'com.google.android.gms:play-services-ads-identifier:17.0.0'
    implementation 'com.google.android.gms:play-services-location:17.1.0'//optional dependency for better targeting
//for browser
    implementation 'androidx.browser:browser:1.3.0'
    implementation 'com.squareup.picasso:picasso:2.71828'
//    implementation 'com.android.support:support-v4:28.0.0'
    implementation 'androidx.recyclerview:recyclerview:1.1.0'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
}

Also Global test mode is on for my placement ads:

I even tried waiting for few minutes and try again tapping on Load AD but this error again shows up, please look into this issue.
Thanks

[HNY11]

the same issue, I have been trying for 3 days even test ads are not being served.

[RHMDHDYT]

I'm facing the same issue with the Banner Ads, It's been a week, and still not showing any Test Ads.
I have already setup the project in the new dashboard (InMobi SSP). Please help.

[sunilkuna5-inmobi]

@RHMDHDYT @HNY11 @hackrx

I hope the issue resolved as our backend has improved the delivery of test ads.

Incase the issue still persists.
Can any of you mention the error received in onAdLoadFailed ?