[firebase_app_check]: Error returned from API. code: 403 body: App attestation failed

I hope you’re doing well.

I’m experiencing an issue with App Check in my Flutter app. Everything was working fine until 02/09/2025, but afterwards I started receiving the following errors:

Error getting App Check token; using placeholder token instead.

Error: com.google.firebase.FirebaseException: No AppCheckProvider installed.
Logging in as <email> with empty reCAPTCHA token 

What I’ve checked so far:

All flavors in my Flutter app are configured with the same SHA fingerprints found in firebase.

Installed the firebase_app_check Flutter package.

However, I’m not receiving the debug token when running in debug mode.

When I try to log in, App Check fails with the above errors.

Environment:

Platform: Flutter (Android only)

Date last working: 02/09/2025

Errors started: after 02/09/2025

Firebase services used: Authentication, App Check Reproducing the issue

I run the app and the first expected should be the token that i need to add to firebase's App check. but nothing in my main.dart i added

await Firebase.initializeApp();

await FirebaseAppCheck.instance.activate( androidProvider: AndroidProvider.debug, );

after adding this i start receiving

Error getting App Check token; using placeholder token instead.  Error: com.google.firebase.FirebaseException: Too many attempts.

Error getting App Check token; using placeholder token instead.  Error: com.google.firebase.FirebaseException: Error returned from API. code: 403 body: App attestation failed. 

when i run ./gradlew signingReport

all :app:signingReport had the same SHA1 and SHA-256 that is from the project keystore

but the packages like all firebase stuff :firebase_*:signingReport SHA1 and SHA-256 were created from the global keystore found in ~/.android/debug.keystore