I’m seeing the “already signed in” error message
I'm still seeing this issue in Minecraft v2.01 on my PS4.
I've tried:
Closing and re-opening the application (Minecraft)
Restarting the Playstation
Deleting and re-installing the application.
Changing the password for my Microsoft account
Retrying the 'Sign in with a Microsoft Account' button multiple times
Verified working. Thank you