Fix Bugs on Signin/Signup pages on web app

I need help fixing bugs on the signin and signup pages of my custom-coded web app. Users are encountering error messages on both pages.

Requirements:
- Troubleshoot and resolve error messages
- Ensure smooth functionality for both signin and signup
- Fix ErrorException
- Test thoroughly after fixes

Ideal Skills & Experience:
- Proficiency in web app development and debugging
- Experience with custom code and error resolution
- Strong problem-solving skills