App Crashes on Cancel or after payment

[CastanetLaurentiu]

I am trying to implement the braintree flow in my app and it seems to work until I click "Cancel and return to.." or I go through the entire payment process and crashes when it has to return to the app.

This is the error I get

E/AndroidRuntime(11837): FATAL EXCEPTION: main
E/AndroidRuntime(11837): Process: net.castanet.app, PID: 11837
E/AndroidRuntime(11837): java.lang.RuntimeException: Unable to start activity ComponentInfo{net.castanet.app/com.braintreepayments.api.DropInActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.os.Bundle.setClassLoader(java.lang.ClassLoader)' on a null object reference
E/AndroidRuntime(11837): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3645)
E/AndroidRuntime(11837): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3782)
E/AndroidRuntime(11837): at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101)
E/AndroidRuntime(11837): at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
E/AndroidRuntime(11837): at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
E/AndroidRuntime(11837): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2307)
E/AndroidRuntime(11837): at android.os.Handler.dispatchMessage(Handler.java:106)
E/AndroidRuntime(11837): at android.os.Looper.loopOnce(Looper.java:201)
E/AndroidRuntime(11837): at android.os.Looper.loop(Looper.java:288)
E/AndroidRuntime(11837): at android.app.ActivityThread.main(ActivityThread.java:7872)
E/AndroidRuntime(11837): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(11837): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
E/AndroidRuntime(11837): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
E/AndroidRuntime(11837): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.os.Bundle.setClassLoader(java.lang.ClassLoader)' on a null object reference
E/AndroidRuntime(11837): at com.braintreepayments.api.DropInActivity.getDropInRequest(DropInActivity.java:124)
E/AndroidRuntime(11837): at com.braintreepayments.api.DropInActivity.onCreate(DropInActivity.java:78)
E/AndroidRuntime(11837): at android.app.Activity.performCreate(Activity.java:8305)
E/AndroidRuntime(11837): at android.app.Activity.performCreate(Activity.java:8284)
E/AndroidRuntime(11837): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1417)
E/AndroidRuntime(11837): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3626)
E/AndroidRuntime(11837): ... 12 more
I/Process (11837): Sending signal. PID: 11837 SIG: 9
Lost connection to device.

Exited.

This is my android manifest

    <activity android:name="com.braintreepayments.api.DropInActivity"
android:launchMode="singleTask" android:exported="true" tools:node="merge">
<intent-filter tools:node="removeAll" />
        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.BROWSABLE" />
            <data android:scheme="${applicationId}.braintree" />
        </intent-filter>
    </activity>
    <activity android:name="com.braintreepayments.api.ThreeDSecureActivity" tools:replace="android:theme"  android:theme="@style/Theme.AppCompat.Light"  android:exported="true">
    </activity>


    <!-- Don't delete the meta-data below.
         This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
    <meta-data
        android:name="flutterEmbedding"
        android:value="2" />
</application>

<queries>
    <intent>
        <action android:name="android.intent.action.PROCESS_TEXT"/>
        <data android:mimeType="text/plain"/>
    </intent>
</queries>

And this is the function for triggering the payment process

void startPayPalPayment(price, message, token) async {
final request = BraintreeDropInRequest(
clientToken: token,
collectDeviceData: true,
paypalRequest: BraintreePayPalRequest(
amount: price,
displayName: 'Castanet',
),
);
BraintreeDropInResult? result = await BraintreeDropIn.start(request);
if (result != null) {
print('Nonce: ${result.paymentMethodNonce.nonce}');
} else {
print('Selection was canceled.');
}
}

Any help is much appreciated.