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I'm doing a GCM to FCM Migration for my app. But when testing my final code on a device I get the following error in my Logcat and the call to Firebase fails.
E/FirebaseInstanceId: Token retrieval failed: RST
There is no information in the Firebase docs what "RST" means etc..
Who can help me out?
EDIT
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It doesn't expire though. It renews itself if one of the following happens. According to https://firebase.google.com/docs/cloud-messaging/android/client: -The app deletes Instance ID.
Access the registration token FCM requires a firebase-messaging-sw.js file. Unless you already have a firebase-messaging-sw.js file, create an empty file with that name and place it in the root of your domain before retrieving a token. You can add meaningful content to the file later in the client setup process.
Just try using
FirebaseInstanceId.getInstance().getToken()
And also add
FirebaseOptions.Builder().setGcmSenderId("YOUR_SENDER_ID")
before calling the getToken Method.. Hope it helps
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