No ads found by MoPub while using the testing ad unit ID

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I'm embedding MoPub ads in my app. But it always returns "No Adds found" message. Though I'm using the testing ad unit ID "24534e1901884e398f1253216226017e" found here. It's for an Interstitial ad. What could be the reason?

protected void onCreate(Bundle aSavedInstanceState) {
    super.onCreate(aSavedInstanceState);
    setContentView(R.layout.activity_homescreen);


    final HomeActivity mHomeActivity = this;

    SdkConfiguration sdkConfiguration = new SdkConfiguration.Builder("24534e1901884e398f1253216226017e")
            .withLogLevel(MoPubLog.LogLevel.DEBUG)
            //.withLegitimateInterestAllowed(false)
            //.withAdditionalNetwork(InMobiAdapterConfiguration.class.getName())
            .build();

    MoPub.initializeSdk(this, sdkConfiguration, new SdkInitializationListener() {
        @Override
        public void onInitializationFinished() {
            Log.d("Mopub", "SDK initialized");
            mInterstitial = new MoPubInterstitial(mHomeActivity, "24534e1901884e398f1253216226017e");
            mInterstitial.setInterstitialAdListener(mHomeActivity);
            mInterstitial.load();
        }
    });
}


public void onInterstitialLoaded(MoPubInterstitial interstitial) {
    if (mInterstitial.isReady()) {
        mInterstitial.show();
    }
}

@Override
public void onInterstitialFailed(MoPubInterstitial interstitial, MoPubErrorCode errorCode) {
    Toast.makeText(this, "MoPub failed: " + errorCode, Toast.LENGTH_LONG).show();
}

build.gradle(:app)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion '29.0.3'
    defaultConfig {
        applicationId "com.mralshahawy.symbianbellelauncher"
        minSdkVersion 21
        targetSdkVersion 29
        versionCode 83
        versionName "9.3"
    }
    buildTypes {
        release {
            lintOptions {
                disable 'MissingTranslation'
                checkReleaseBuilds false
                abortOnError false
            }
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')

    implementation 'com.android.volley:volley:1.1.1'


    implementation ('com.mopub:mopub-sdk:5.15.0'){
        transitive = true
    }
    implementation 'com.google.ads.mediation:mopub:5.3.0.1'

}

Logcat - Filtered using the word "mopub" in "verbose" mode.

2021-02-22 16:58:57.848 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.MoPub][initializeSdk] SDK initialization started
2021-02-22 16:58:57.849 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.MoPub][initializeSdk] SDK Log - SDK initialize has been called with ad unit: 24534e1901884e398f1253216226017e
2021-02-22 16:58:57.850 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.MoPub][initializeSdk] SDK Log - com.mralshahawy.symbianbellelauncher was built with target SDK version of 29
2021-02-22 16:58:58.199 30005-30113/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.GpsHelper][fetchAdvertisingInfoSync] SDK Log - Unable to obtain Google AdvertisingIdClient.Info via reflection.
2021-02-22 16:58:58.200 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.TapjoyAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.TapjoyAdapterConfiguration
2021-02-22 16:58:58.202 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.ChartboostAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.ChartboostAdapterConfiguration
2021-02-22 16:58:58.204 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.FacebookAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.FacebookAdapterConfiguration
2021-02-22 16:58:58.205 30005-30113/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.privacy.PersonalInfoManager$5][onInitializationFinished] Consent Log - MoPubIdentifier initialized.
2021-02-22 16:58:58.205 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.IronSourceAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.IronSourceAdapterConfiguration
2021-02-22 16:58:58.207 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.SnapAdAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.SnapAdAdapterConfiguration
2021-02-22 16:58:58.209 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.VerizonAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.VerizonAdapterConfiguration
2021-02-22 16:58:58.211 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.AdColonyAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.AdColonyAdapterConfiguration
2021-02-22 16:58:58.213 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.AppLovinAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.AppLovinAdapterConfiguration
2021-02-22 16:58:58.214 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.GooglePlayServicesAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.GooglePlayServicesAdapterConfiguration
2021-02-22 16:58:58.217 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.VungleAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.VungleAdapterConfiguration
2021-02-22 16:58:58.218 30005-30106/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.util.AsyncTasks][safeExecuteOnExecutor] SDK Log - Posting AsyncTask to main thread for execution.
2021-02-22 16:58:58.219 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.PangleAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.PangleAdapterConfiguration
2021-02-22 16:58:58.220 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.AdapterConfigurationManager$AdapterConfigurationsInitializationAsyncTask][doInBackground] SDK Log With Throwable - Unable to find class com.mopub.mobileads.UnityAdsAdapterConfiguration, java.lang.ClassNotFoundException: com.mopub.mobileads.UnityAdsAdapterConfiguration
2021-02-22 16:58:58.270 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.GpsHelper][fetchAdvertisingInfoSync] SDK Log - Unable to obtain Google AdvertisingIdClient.Info via reflection.
2021-02-22 16:58:58.283 30005-30106/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.util.AsyncTasks][safeExecuteOnExecutor] SDK Log - Posting AsyncTask to main thread for execution.
2021-02-22 16:58:58.396 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.MoPub$InternalSdkInitializationListener][onInitializationFinished] SDK initialized and ready to display ads.
    Initialized adapters:
    No adapters initialized.
2021-02-22 16:58:58.399 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.GpsHelper][fetchAdvertisingInfoSync] SDK Log - Unable to obtain Google AdvertisingIdClient.Info via reflection.
2021-02-22 16:58:58.427 30005-30005/com.mralshahawy.symbianbellelauncher D/Mopub: SDK initialized
2021-02-22 16:58:58.445 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.mobileads.MoPubInterstitial][load] Ad attempting to load
2021-02-22 16:58:58.466 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.mobileads.AdViewController][loadNonJavascript] SDK Log - Loading url: https://ads.mopub.com/m/ad?v=6&id=24534e1901884e398f1253216226017e&nv=5.15.0&dn=samsung%2CSM-M115F%2Cm11qnnxx&bundle=com.mralshahawy.symbianbellelauncher&z=%2B0200&o=p&cw=720&ch=1495&w=720&h=1560&sc=1.75&mcc=602&mnc=03&cn=etisalat&ct=2&av=9.3&ifa=mp_tmpl_advertising_id&dnt=mp_tmpl_do_not_track&tas=mp_tmpl_tas&mid=mp_tmpl_mopub_id&gdpr_applies=0&force_gdpr_applies=0&current_consent_status=unknown&vv=4&vver=1.3.4-Mopub&mr=1
2021-02-22 16:58:58.474 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.GpsHelper][fetchAdvertisingInfoSync] SDK Log - Unable to obtain Google AdvertisingIdClient.Info via reflection.
2021-02-22 16:58:58.491 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.GpsHelper][fetchAdvertisingInfoSync] SDK Log - Unable to obtain Google AdvertisingIdClient.Info via reflection.
2021-02-22 16:58:58.506 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.network.AdLoader][fetchAd] Ad requesting from AdServer: https://ads.mopub.com/m/ad
    {"vv":"4","nv":"5.15.0","mid":"df2ad4d4-ab21-47e8-8d69-217e2cdfd024","dn":"samsung,SM-M115F,m11qnnxx","mcc":"602","sc":"1.75","current_consent_status":"unknown","vver":"1.3.4-Mopub","id":"24534e1901884e398f1253216226017e","bundle":"com.mralshahawy.symbianbellelauncher","gdpr_applies":"0","mnc":"03","ch":"1495","ifa":"","mr":"1","tas":"authorized","h":"1560","force_gdpr_applies":"0","cn":"etisalat","dnt":"0","o":"p","ct":"2","cw":"720","av":"9.3","v":"6","w":"720","z":"+0200"}
2021-02-22 16:58:58.509 30005-30107/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.util.AsyncTasks][safeExecuteOnExecutor] SDK Log - Posting AsyncTask to main thread for execution.
2021-02-22 16:58:58.524 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.GpsHelper][fetchAdvertisingInfoSync] SDK Log - Unable to obtain Google AdvertisingIdClient.Info via reflection.
2021-02-22 16:58:59.290 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.network.TrackingRequest$1][onResponse] SDK Log - Successfully hit tracking endpoint: https://ads.mopub.com/m/open
2021-02-22 16:58:59.310 30005-30107/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.network.MultiAdResponse][parseSingleAdResponse] Ad server responded with:
    {"metadata":{"x-orientation":"p","x-scrollable":"0","x-adtype":"html","x-creativeid":"7f1de24619954d15b4b40eb4f75522f6","x-adgroupid":"365cd2475e074026b93da14103a36b97","vast-player-version":1,"content-type":"text\/html; charset=UTF-8","x-browser-agent":0,"imptrackers":["https:\/\/ads.mopub.com\/m\/imp?cid=7f1de24619954d15b4b40eb4f75522f6&city=Cairo&ckv=2&country_code=EG&cppck=60A51&current_consent_status=unknown&dev=SM-M115F&exclude_adgroups=365cd2475e074026b93da14103a36b97&gdpr_applies=0&id=24534e1901884e398f1253216226017e&is_mraid=0&os=Android&osv=10.0.0&priority=5&req=56b258b0fabf4c51b1555cabeb8e38b1_00d6e4c900bf13ef&reqt=1614005940.0&rev=0.000050&udid=mopub%3Adf2ad4d4-ab21-47e8-8d69-217e2cdfd024&video_type="],"impdata":{"id":"56b258b0fabf4c51b1555cabeb8e38b1_00d6e4c900bf13ef","adunit_id":"24534e1901884e398f1253216226017e","adunit_name":"Android Sample App Fullscreen","adunit_format":"Fullscreen","adgroup_id":"365cd2475e074026b93da14103a36b97","adgroup_name":"Non-Mrect Ads","adgroup_type":"gtee","currency":"USD","country":"EG","app_version":"9.3","adgroup_priority":6,"publisher_revenue":5.0E-5,"precision":"publisher_defined"},"x-after-load-url":"https:\/\/cb.mopub.com\/load?account_id=1308c11342c349e8a2934d8bb8fd33f6&adgroup_id=365cd2475e074026b93da14103a36b97&adgroup_priority=5&adgroup_type=gtee&adunit_format=Fullscreen&adunit_id=24534e1901884e398f1253216226017e&app_id=108e64891ab140adbe7d2325510533e9&campaign_id=ec34471d5f1443f79904715c075bdcbb&cid=7f1de24619954d15b4b40eb4f75522f6&cluster=atla&connection_type=2&country=EG&hostname=atla-ign-09-sr1.prod.twttr.net&is_mraid=0&log_attempt=1&logged_server_side=0&os=Android&request_id=56b258b0fabf4c51b1555cabeb8e38b1_00d6e4c900bf13ef&request_ts_ms=1614005940&round_trip_count=0&sdk_version=5.15.0&load_result=%%LOAD_RESULT%%&load_duration_ms=%%LOAD_DURATION_MS%%","clicktrackers":["https:\/\/ads.mopub.com\/m\/aclk?cid=7f1de24619954d15b4b40eb4f75522f6&city=Cairo&ckv=2&country_code=EG&cppck=D9E32&current_consent_status=unknown&dev=SM-M115F&exclude_adgroups=365cd2475e074026b93da14103a36b97&gdpr_applies=0&id=24534e1901884e398f1253216226017e&is_mraid=0&os=Android&osv=10.0.0&priority=5&req=56b258b0fabf4c51b1555cabeb8e38b1_00d6e4c900bf13ef&reqt=1614005940.0&rev=0&udid=mopub%3Adf2ad4d4-ab21-47e8-8d69-217e2cdfd024&video_type="],"x-before-load-url":"noop","x-ad-timeout-ms":30000},"content":"<!DOCTYPE html> <html> <head>  <!-- Adgroup is 365cd2475e074026b93da14103a36b97 -->  <meta http-equiv=\"Content-Security-Policy\" content=\"upgrade-insecure-requests\">  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, user-scalable=no\">  <style type='text\/css'> .mp_center { position: fixed; top: 50%; left: 50%; margin-left: -160px !important; margin-top: -240px !important; } <\/style>  <script type=\"text\/javascript\"> function mopubFinishLoad(){ setTimeout(function() { window.location = 'mopub:\/\/finishLoad'; }, 0); } <\/script>  <script type=\"text\/javascript\"> function webviewDidClose(){ if (typeof webviewDidCloseHelper == 'function') 
2021-02-22 16:58:59.311 30005-30107/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.network.MultiAdResponse][parseSingleAdResponse] { webviewDidCloseHelper(); } } function webviewDidAppear(){  if(typeof trackImpressionHelper == 'function') { trackImpressionHelper(); }  if(typeof webviewDidAppearHelper == 'function') { webviewDidAppearHelper(); } } window.addEventListener(\"load\", function() { var links = document.getElementsByTagName('a'); for(var i=0; i < links.length; i++) { links[i].setAttribute('target','_blank'); } }, false); <\/script>  <\/head> <body style=\"margin:0;padding:0;\"> <!DOCTYPE html>\n<html>\n  <head><\/head>\n  <style>\n    @-webkit-keyframes animatedBackground {\n      from { background-position: 0 0; }\n      to { background-position: 100% 0; }\n    }\n\n    @-webkit-keyframes fadeIn {\n      from { opacity: 0; max-width: 50%; }\n      to { opacity: 1; max-width: 100%; }\n    }\n\n  body, html {\n      padding: 0;\n      margin: 0;\n      font-family: \"HelveticaNeue-Light\", \"Helvetica Neue Light\", \"Helvetica Neue\", Helvetica, Arial, \"Lucida Grande\", sans-serif;\n      height: 100%;\n    }\n\n    a {\n      color: black;\n      text-decoration: none;\n    }\n\n    footer,\n    header,\n    section {\n      display: block;\n    }\n\n    #workspace {\n      background-image: url(https:\/\/d30x8mtr3hjnzo.cloudfront.net\/creatives\/c45945f4063a4789a79aec907bcb04cc);\n      background-position: 0 0;\n      position: absolute;\n      top: 0;\n      bottom: 0;\n      left: 0;\n      right: 0;\n      width: 100%;\n      height: 100%;\n\n      -webkit-animation: animatedBackground 20s linear infinite;\n    }\n\n    header {\n      position: absolute;\n      top: 0;\n      left: 0;\n      right: 0;\n      height: 100px;\n      line-height: 100px;\n      background-color: #20ace5;\n      text-transform: capitalize;\n      color: white;\n      text-align: center;\n      font-size: 40px;\n    }\n\n    footer {\n      position: absolute;\n      bottom: 0;\n      left: 0;\n      right: 0;\n      text-align: center;\n      padding-bottom: 18px;\n    }\n\n    footer p {\n      font-size: 24px;\n      margin-bottom: 12px;\n      font-style: italic;\n      font-weight: 100;\n    }\n\n    .centered {\n      max-width: 100%;\n      height: auto;\n      overflow: auto;\n      margin: auto;\n      position: absolute;\n      top: 0; left: 0; bottom: 0; right: 0;\n    }\n\n    #star-circle {\n    }\n\n    #nice {\n      -webkit-animation: fadeIn 1s ease-in;\n    }\n\n  <\/style>\n  <body> <a href=\"https:\/\/www.mopub.com\/click-test\/\">\n  <div id=\"workspace\">\n    <header>\n      Success!\n    <\/header>\n    <img id=\"star-circle\" class=\"centered\" src=\"https:\/\/d30x8mtr3hjnzo.cloudfront.net\/creatives\/e92584303dbf4f7e908f663060f3b07b\" \/>\n    <img id=\"nice\" class=\"centered\" src=\"https:\/\/d30x8mtr3hjnzo.cloudfront.net\/creatives\/6d4b7ded21fd41428ff2f0670ca3ba3f\"\/>\n    <footer>\n      <p>Tap to test this ad.<\/p>\n      <img id=\"mopub\" src=\"https:\/\/d30x8mtr3hjnzo.cloudfront.net\/creatives\/2a7466458cfd4c70adb556da05587270\">\n    <\/footer>\n  <\/div>\n  <\/a><\/body>\n<\/html> <script type=\"text\/javascript\"> i
2021-02-22 16:58:59.311 30005-30107/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.network.MultiAdResponse][parseSingleAdResponse] f (typeof htmlWillCallFinishLoad == \"undefined\" || !htmlWillCallFinishLoad) { if(typeof mopubFinishLoad == 'function') { window.onload = mopubFinishLoad; } }  <\/script>  <\/body> <\/html>"}
2021-02-22 16:58:59.331 30005-30108/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.util.AsyncTasks][safeExecuteOnExecutor] SDK Log - Posting AsyncTask to main thread for execution.
2021-02-22 16:58:59.331 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.mobileads.AdViewController][loadBaseAd] SDK Log - Loading ad adapter.
2021-02-22 16:58:59.334 30005-30108/com.mralshahawy.symbianbellelauncher E/Volley: [99861] NetworkDispatcher.processRequest: Unhandled exception java.lang.RuntimeException: Bad URL noop
    java.lang.RuntimeException: Bad URL noop
        at com.mopub.volley.toolbox.BasicNetwork.performRequest(BasicNetwork.java:143)
        at com.mopub.volley.NetworkDispatcher.processRequest(NetworkDispatcher.java:132)
        at com.mopub.volley.NetworkDispatcher.processRequest(NetworkDispatcher.java:111)
        at com.mopub.volley.NetworkDispatcher.run(NetworkDispatcher.java:90)
     Caused by: java.net.MalformedURLException: no protocol: noop
        at java.net.URL.<init>(URL.java:601)
        at java.net.URL.<init>(URL.java:498)
        at java.net.URL.<init>(URL.java:447)
        at com.mopub.volley.toolbox.HurlStack.executeRequest(HurlStack.java:87)
        at com.mopub.network.RequestQueueHttpStack.executeRequest(RequestQueueHttpStack.java:57)
        at com.mopub.volley.toolbox.BasicNetwork.performRequest(BasicNetwork.java:91)
        at com.mopub.volley.NetworkDispatcher.processRequest(NetworkDispatcher.java:132) 
        at com.mopub.volley.NetworkDispatcher.processRequest(NetworkDispatcher.java:111) 
        at com.mopub.volley.NetworkDispatcher.run(NetworkDispatcher.java:90) 
2021-02-22 16:58:59.363 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.mobileads.AdViewController][loadBaseAd] SDK Error Log - Error loading ad adapter, java.lang.reflect.InvocationTargetException
2021-02-22 16:58:59.366 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.mobileads.AdViewController][loadFailUrl] SDK Log With Throwable - Load failed., Unable to find Native Network or ad adapter.
2021-02-22 16:58:59.366 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.mobileads.AdViewController][loadNonJavascript] SDK Log - Loading url: 
2021-02-22 16:58:59.393 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.network.AdLoader][fetchAd] Ad requesting from AdServer: https://ads.mopub.com/m/ad
    {"vv":"4","nv":"5.15.0","mid":"df2ad4d4-ab21-47e8-8d69-217e2cdfd024","dn":"samsung,SM-M115F,m11qnnxx","mcc":"602","sc":"1.75","current_consent_status":"unknown","tqr":"YDPGtECd6NWetwCSAJVdtzT0KJJvAtddw2qd_g","exclude":"365cd2475e074026b93da14103a36b97","vver":"1.3.4-Mopub","id":"24534e1901884e398f1253216226017e","bundle":"com.mralshahawy.symbianbellelauncher","gdpr_applies":"0","rtc":"1","ac":"0","mnc":"03","ch":"1495","ifa":"","mr":"1","tas":"authorized","force_gdpr_applies":"0","h":"1560","cn":"etisalat","dnt":"0","cppck":"D387D","o":"p","ct":"2","cw":"720","av":"9.3","v":"6","w":"720","z":"+0200","request_id":"56b258b0fabf4c51b1555cabeb8e38b1_00d6e4c900bf13ef"}
2021-02-22 16:58:59.395 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.network.TrackingRequest$1][onErrorResponse] SDK Log - Failed to hit tracking endpoint: noop
2021-02-22 16:58:59.396 30005-30114/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.common.GpsHelper][fetchAdvertisingInfoSync] SDK Log - Unable to obtain Google AdvertisingIdClient.Info via reflection.
2021-02-22 16:58:59.654 30005-30106/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.network.MultiAdResponse][parseSingleAdResponse] Ad server responded with:
    {"metadata":{"x-adtype":"clear","x-backfill":"clear","x-refreshtime":60},"content":""}
2021-02-22 16:58:59.656 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.network.AdLoader$1][onErrorResponse] Ad server responded with:
    No ads found for ad unit.
2021-02-22 16:58:59.658 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.mobileads.AdViewController][adDidFail] SDK Log - Ad failed to load.
2021-02-22 16:58:59.662 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.mobileads.MoPubInterstitial][onAdLoadFailed] Ad failed to load: (10,000) No ads found.
2021-02-22 16:59:00.269 30005-30005/com.mralshahawy.symbianbellelauncher I/MoPub: [com.mopub.network.TrackingRequest$1][onResponse] SDK Log - Successfully hit tracking endpoint: https://cb.mopub.com/load?account_id=1308c11342c349e8a2934d8bb8fd33f6&adgroup_id=365cd2475e074026b93da14103a36b97&adgroup_priority=5&adgroup_type=gtee&adunit_format=Fullscreen&adunit_id=24534e1901884e398f1253216226017e&app_id=108e64891ab140adbe7d2325510533e9&campaign_id=ec34471d5f1443f79904715c075bdcbb&cid=7f1de24619954d15b4b40eb4f75522f6&cluster=atla&connection_type=2&country=EG&hostname=atla-ign-09-sr1.prod.twttr.net&is_mraid=0&log_attempt=1&logged_server_side=0&os=Android&request_id=56b258b0fabf4c51b1555cabeb8e38b1_00d6e4c900bf13ef&request_ts_ms=1614005940&round_trip_count=0&sdk_version=5.15.0&load_result=missing_adapter&load_duration_ms=37
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Yoyo Lin On

The code looks fine to me.
Do you have the detail device log showing the ad failed reason? Also, may I know if you are using landscape orientation in your layout?

If you have any other question, feel free to raise the issue in our Github repositories.

Yoyo Lin
MoPub Team