can't catch deferred deeplink

[babaykaVadym]

Hello!
Try catch deferred deeplink used different methods, but always returns null and (ConnectState.done, Instance of "DeferredAppLink", null)

FutureBuilder(
future: FacebookApplinks.instance.fetchDeferredAppLink(),
builder: (context, snapshot) {
if (snapshot.hasData) {
return Text('Text $snapshot');
}
return Text('Text no $snapshot');
}),

or

s = (await FacebookApplinks.instance.fetchDeferredAppLink()).toString();
s1 = (await FacebookApplinks.instance.getInitialAppLink()).toString();
await FacebookApplinks.instance.fetchDeferredAppLink().then((value) {
s2 = value.toString();
});
await FacebookApplinks.instance.getInitialAppLink().then((value) {
s3 = value.toString();
});

[jjsebastianfuertes]

I'm always getting null and platform error; any idea what can be the problem?