我在Google Play上为少数用户报告此崩溃异常，我无法重现这一点：
java.lang.NullPointerException:
at android.webkit.WebViewClassic.loadUrlImpl(WebViewClassic.java:2771)
at android.webkit.WebViewClassic.loadUrlImpl(WebViewClassic.java:2787)
at android.webkit.WebViewClassic.loadUrl(WebViewClassic.java:2780)
at android.webkit.WebView.loadUrl(WebView.java:843)
at org.apache.cordova.engine.SystemWebViewEngine.loadUrl(SystemWebViewEngine.java:268)
at org.apache.cordova.CordovaWebViewImpl.loadUrlIntoView(CordovaWebViewImpl.java:129)
at org.apache.cordova.CordovaWebViewImpl.loadUrl(CordovaWebViewImpl.java:198)
at com.rjfun.cordova.ext.CordovaPluginExt.fireEvent(CordovaPluginExt.java:69)
at com.rjfun.cordova.ad.GenericAdPlugin.fireEvent(GenericAdPlugin.java:221)
at com.rjfun.cordova.ad.GenericAdPlugin.fireAdErrorEvent(GenericAdPlugin.java:764)
at com.rjfun.cordova.admob.AdMobPlugin.access$200(AdMobPlugin.java:35)
at com.rjfun.cordova.admob.AdMobPlugin$BannerListener.onAdFailedToLoad(AdMobPlugin.java:500)
at com.google.android.gms.ads.internal.client.zzc.onAdFailedToLoad(Unknown Source:0)
at com.google.android.gms.ads.internal.client.zzq$zza.onTransact(Unknown Source:0)
at android.os.Binder.transact(Binder.java:310)
at com.google.android.gms.ads.internal.client.z.a(:com.google.android.gms.DynamiteModulesA:124)
at com.google.android.gms.ads.internal.a.a(:com.google.android.gms.DynamiteModulesA:872)
at com.google.android.gms.ads.internal.a.b(:com.google.android.gms.DynamiteModulesA:424)
at com.google.android.gms.ads.internal.c.b(:com.google.android.gms.DynamiteModulesA:164)
at com.google.android.gms.ads.internal.m.run(:com.google.android.gms.DynamiteModulesA:150)
at android.os.Handler.handleCallback(Handler.java:800)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5476)
at java.lang.reflect.Method.invokeNative(Native Method:0)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method:0)
我无法确定发生了什么。我可以看到Admob参与了跟踪，Admob是导致此次崩溃的原因吗？