Android Question app firebase

[Isac]

hello, I followed the tutorial: https://www.b4x.com/android/forum/t...s-firebase-cloud-messaging-fcm.67716/#content but when I start the app it closes immediately.

if instead I delete this line:

CallSubDelayed(FirebaseMessaging, "SubscribeToTopics")

the app remains open but the message does not arrive, do you have any idea?
thank you

 

[DonManfred]

when I start the app it closes immediately.

Where is the full error?

Do not expect we could help with this less info!