Flutter Web cloud_firestore package: Versions newer than 0.12.11 produces just a blank web page

When I run the command: flutter build web => I get a blank web page. If I use cloud_firestore::0.12.11 OR older, all runs perfectly well.

Steps to reproduce the behavior:

• flutter doctor. No issues found.
• flutter run -d chrome. The app runs OK on the local browser.
• flutter build web. The app runs and shows a blank page.
• In pubspec.yaml: remove the dependency cloud_firestore: The app runs OK.
• In pubspec.yaml: add the dependency cloud_firestore:0.12.11 (older version), The app runs OK.

Expected behavior

• I need to use cloud_firestore: 0.14.0+2 so I can use the data type FirebaseFirestore.