Flutter App Sign-Up Issue Debugging

Job ID: 38801245

Budget: ₹600 – ₹1,500 INR

I am facing a critical issue with my Flutter application where the sign-up feature is malfunctioning. The problem persists on both the Android version and the Web app. It appears to be an API error originating from my backend service, which is Firebase.

Key Requirements:
- Diagnose and rectify the sign-up issue in the Flutter application.
- Ensure the fix is applicable to both the Android app and the Web version.
- Provide a brief explanation of the error and the solution implemented.

Ideal Skills:
- Proficient in Flutter development.
- Extensive experience with Firebase as a backend service.
- Strong debugging skills, particularly in identifying API-related issues.

I need someone who can not only fix this problem promptly but also help me understand the root cause, so I can prevent similar issues in the future.