I decided to delete my account and sign in again, but only to discover that the Windows 10 Mail app cannot sign into my gmail account. However, when I did the same to my other gmail account it was fine. 

The error code is 0x8000000b

These are the following things that I have done but rendered fruitless:

1. Create account using POP/IMAP

2. Enableded Forwarding IMAP in my gmail account

3. Trouble shooting in the Windows system

4. Rest Mail & Calendar app

5. Uninstall & reinstall Mail & Calendar app

I think I have exhausted everything possible but it still hasn't been working. Any advice and suggestions would be greatly appreciated! Thank you.