what causes “permission denied”-message with FIREBASE and FLUTTER
问题 I've got the error 'W/SyncTree(31625): Listen at /address failed: DatabaseError: Permission denied' while sending a request to firebase with an anonymous firebase user and without fancy firebase database rules :) . ..and i want to find out what causes this message. EDIT: error is the same with an existing user, means user signIn seems to work but accessing database not. What i've done so far: Set up firebase (including adding google_service.json, dependencies in pubspec.yaml) - works so far