Flutter build failed 'UserAgent.h' file not found

Question

Project cannot build or debug with firebase_crashlytics. In my mac I\'ve updated to Flutter latest but the machine we are deploying the app have lower version (Flutter 1.9.1 hot

Answer 1

As mentioned in the firestore issue ticket, fixing the version of the firebase core to 0.4.4 instead of using 0.4.4+2 fixed the issue:

dependency_overrides:
  firebase_core: 0.4.4

Add this along with your existing firebase_auth dependency.