Xbox will not sign into profile or add new profiles

It's not working at all, can't sign in or add new profile

I believe you need to use your e-mail address.

Add a new member to your Xbox One family

Overview

Creating a “family” on Xbox One helps you manage privacy and online safety settings for children.

Any adult in the family can add new members to the family. Adults and children in the family have different rights when it comes to managing the family. Learn more about who can manage the family.

To add a family member, follow these steps:

Note To add a new member to your family, you must be signed in to Xbox Live.

1.Press the Menu button on your controller, go to Settings on your console, and then scroll right to the FAMILY section. Select Add to family.

2.Choose who you want to add:

a.If the person you want to add to the family already has an Xbox Live profile saved on the console, select that profile.

b.The person must then sign in with the email address and password for their Microsoft account.

c.Select Add to family again.

d.You should now see the person added to the family.

e.If the person you’re adding is a child, and you haven’t already associated their account with yours, you’ll need to provide parental consent in order to complete this process.

f.If the person you want to add has an Xbox Live profile, but it’s not saved on the console, skip to step 3. If the person doesn’t have an Xbox Live profile, skip to step 4.

3.If the person you want to add has an Xbox Live profile but has never saved the profile to this console, select Add new and have the person sign in by providing the Microsoft account and password associated with that profile.

4.If the person doesn’t have an Xbox Live profile, click Add new and have the person create an Xbox Live profile. Then, go back to step 2a and complete the process.

Note For information about how to create a new account and profile, see Manage your Microsoft account.

When you return to Settings, you’ll see the new profile under Family.

Press the Xbox button to open the guide, go to Profile & system > Add or switch > Add new. Follow the on-screen instructions to enter the sign-in info for your account where you have the Gold subscription.

Source: https://support.xbox.com/en/help/account-profile/manage-account/sign-in

Correct, game saves are synced with Xbox Live cloud services as long as you have been online. Please check these articles for more info!

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that will not remove progress in games right?