Apk Closes When Start

I cant start my apk in android studio with debugging it closes and i have 0 erros
i use bb2

 

If you you are using admob you need to add the APK key like this:

Code:

<application android:label="@string/app_name"
        android:icon="@drawable/icon"
        android:allowBackup="true"
        android:name="androidx.multidex.MultiDexApplication">

...
        <meta-data android:name="com.google.android.gms.ads.APPLICATION_ID"
            android:value="ca-app-pub-yourkey"/>

...