You may getting “We couldn’t sign you in – The parameter is incorrect” error message when trying to do a Windows 10 update, Fix insider build or in the Store.
To fix this go to settings -> Accounts
Your Account -> Add a Microsoft Account
If you already assigned a Microsoft account, add the same account again or if you don’t, add a Microsoft account.
Thanks a million, I had hit the same issue but when I added exactly the same account again it all worked 🙂