How can I open an App using it own background service - xamarin

Question

I'm creating Xamarin.Forms App and it has a service that runs in the background monitoring if any messages arrive. If a message arrives, the service should open the App.
I tried to open the App using Intent (Dependency Service) and I also tried using Xamarin.Essentials. Neither way worked.
My last attempt was with Xamarin.Essentials and gave the following error:
[Error][1]
[1]: https://i.stack.imgur.com/5jPGf.png
This is my code using Intent (Dependency Service):
//Intent (Dependency Service)
string teste = "com.saferit.saferproject";
openAppManager = DependencyService.Get<IAppHandler>();
openAppManager.Initialize(teste);
openAppManager.LaunchApp();
[enter image description here][2]
[2]: https://i.stack.imgur.com/lLx3g.png
This is my native code for Android
public void LaunchApp()
{
Intent intent = new Intent();
intent.SetClassName(Package, "activity");
intent.AddFlags(ActivityFlags.NewTask);
Xamarin.Forms.Forms.Context.StartActivity(intent);
}
[Complete Native Code][3]
[3]: https://i.stack.imgur.com/G4zOV.png
This is my AndroidManifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.saferit.saferproject" android:installLocation="preferExternal">
<uses-sdk android:minSdkVersion="27" android:targetSdkVersion="29" />
<!--<application android:label="SaferProject.Android"></application>-->
<application android:label="com.saferit.saferproject" android:icon="#drawable/logo">
<activity android:icon="#drawable/logo" android:label="com.saferit.saferproject" android:name="com.saferit.saferproject">
<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="com.saferit.saferproject" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
</manifest>
This is my attempt using Xamarin.Essential:
//Xamarin.Essentials
var appname = "com.saferit.saferproject://";
var supportsUri = await Launcher.CanOpenAsync(appname);
if (supportsUri)
await Launcher.OpenAsync(appname);
Looking for here at stackoverflow I found this question:
Open Notification list page when user clicks on navigation
I tried to implement it on my App but I also couldn't get it to work.
In all three cases the errors are very similar.
I think the problem is in the configuration of the URI of my App.
Can someone help me?