Problem:
The class ‘FirebaseAnalytics’ doesn’t have an unnamed constructor. (Documentation) Try using one of the named constructors defined in ‘FirebaseAnalytics’
This problem occurs when you use following during implementation of Firebase Analytics.
FirebaseAnalytics firebaseAnalytics = FirebaseAnalytics();
Solution:
To solve this issue, just replace FirebaseAnalytics() to FirebaseAnalytics.instance
Example:
FirebaseAnalytics firebaseAnalytics = FirebaseAnalytics.instance;