Interstitial ad not showing

[fvci2015]

@EddyVerbruggen sir i have added admob plugin.
create banner is working fine. but interstitial ad not showing. i have checked ad units properly. no mistake in ad units. please guide where i did a mistake.

my package:

{
  "nativescript": {
    "id": "org.nativescript.adstest",
    "tns-ios": {
      "version": "5.2.0"
    },
    "tns-android": {
      "version": "5.2.1"
    }
  },
  "description": "NativeScript Application",
  "license": "SEE LICENSE IN ",
  "repository": "",
  "dependencies": {
    "@angular/animations": "~7.2.0",
    "@angular/common": "~7.2.0",
    "@angular/compiler": "~7.2.0",
    "@angular/core": "~7.2.0",
    "@angular/forms": "~7.2.0",
    "@angular/http": "~7.2.0",
    "@angular/platform-browser": "~7.2.0",
    "@angular/platform-browser-dynamic": "~7.2.0",
    "@angular/router": "~7.2.0",
    "nativescript-admob": "^3.3.2",
    "nativescript-angular": "~7.2.1",
    "nativescript-theme-core": "~1.0.4",
    "reflect-metadata": "~0.1.12",
    "rxjs": "~6.3.0",
    "tns-core-modules": "~5.2.0",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular/compiler-cli": "~7.2.0",
    "@nativescript/schematics": "~0.5.0",
    "@ngtools/webpack": "~7.2.0",
    "nativescript-dev-typescript": "~0.8.0",
    "nativescript-dev-webpack": "~0.20.0"
  },
  "gitHead": "f548ec926e75201ab1b7c4a3a7ceefe7a4db15af",
  "readme": "NativeScript Application"
}

**test.component.ts **

import { createBanner,showInterstitial, preloadInterstitial  } from "nativescript-admob";
----other stuff----
-----
private androidBannerId: string = "ca-app-pub-xxx";
private androidInterstitialId: string = "ca-app-pub-xxxx";
private androidVideoRewardId: string = "ca-app-pub-xxxxx";

createbanner_method(){
        createBanner({
                              // if this 'view' property is not set, the banner is overlayed on the current top most view
                              // view: ..,
                              testing: false, // set to false to get real banners
                              size: admob.AD_SIZE.SMART_BANNER, // anything in admob.AD_SIZE, like admob.AD_SIZE.SMART_BANNER
                              iosBannerId: "ca-app-pub-XXXXXX/YYYYYY", // add your own
                              androidBannerId: this.androidBannerId, // add your own
                              // Android automatically adds the connected device as test device with testing:true, iOS does not
                              iosTestDeviceIds: ["yourTestDeviceUDIDs", "canBeAddedHere"],
                              margins: {
                                // if both are set, top wins
                                //top: 10
                                bottom: 0
                              },
                              keywords: []  // add keywords for ad targeting
                            }).then(
                                function() {
                                  console.log("admob createBanner done");                              
                                },
                                function(error) {
                                  console.log("admob createBanner error: " + error);
                             }
                       )
      }  
      preloadInter_method(){
              preloadInterstitial({
                testing: false,
                iosInterstitialId: "ca-app-pub-XXXXXX/YYYYY2", // add your own
                androidInterstitialId: this.androidInterstitialId, // add your own
                // Android automatically adds the connected device as test device with testing:true, iOS does not
                iosTestDeviceIds: ["ce97330130c9047ce0d4430d37d713b2"],
                keywords: [], // add keywords for ad targeting
                onAdClosed: function () { console.log("interstitial closed") }
              }).then(
                  function() {
                    console.log("interstitial preloaded - you can now call 'showInterstitial' whenever you're ready to do so");
                  },
                  function(error) {
                    console.log("admob preloadInterstitial error: " + error);
                  }
            )
      }
      showInter_method(){
        showInterstitial().then( 
          function() {
            // this will resolve almost immediately, and the interstitial is shown without a delay because it was already loaded
            console.log("interstitial showing");          
            
          },
          function(error) {
            console.log("admob showInterstitial error: " + error);        
          }
    )
      }

test.component.html:

 <StackLayout >
             <Button text="create banner" (tap)="createbanner_method()"></Button>    
             <Button text="load inter" (tap)="preloadInter_method()"></Button>
             <Button text="show inter" (tap)="showInter_method()"></Button>   
   </StackLayout>

Output i am getting:

admob createBanner done  // banner ad showing

onAdFailedToLoad: 3
admob preloadInterstitial error: 3

Please help i really stuck. thanks in advance

[EddyVerbruggen]

Does the demo app's interstitial work?

[fvci2015]

i did not check the demo app

[EddyVerbruggen]

OK, I'll wait for you to check that out then.

[fvci2015]

ok thank you sir, i will back to you after checking the demo app

[fvci2015]

sir no luck. i have run demo app. In testing mode, working fine.
but in real time (testing:false) not working
showing Error preloading interstitial : 3

[EddyVerbruggen]

Did you Google that error?

[fvci2015]

I don't know what i did mistake.
Steps i did:
Step1: Deleted node modules folder and run "npm install"
Step2: I have removed and added android platform again.
In emulator ads are not showing sometimes. But Real mobile device banners ads, intersitial ads showing properly.
Finally problem solved.
@EddyVerbruggen sir, my device hangs up to 3 secs after intersitial ad. can you suggest when this type of issue occurs??