Bitbucket fails to authenticate on git pull

I think is only an authentication problem...

1. Click on your Bitbucket account icon (up right) and go to "Manage account".
2. Go to "Change password" option in left menu.
3. Enter your password in "New password" and "Confirm password" fields.
4. Click on "Change password".

That's all :)

You need to reset the password as shown below.

On macOS:

git config --global credential.helper osxkeychain

On Windows 10/11:

git config --global credential.helper store

After executing this, it prompts you for the user name and password for your repo.