I cannot add a new account to my Xbox after restarting it

Recently I’ve been having problems loading up Fortnite I found how to fix it by restarting my Xbox in system after I did that I forgot to save old settings from my “old” Xbox I tried to restart it the same way but now when I add new I sit at a loading screen then it just takes me to home so I add new at home sit at a loading screen again then just get nothing no error code nothing just straight back to home it’s been like this since yesterday I really need help I’ve tried another persons advice given to someone who had the same problem but it didn’t work if anyone can help me ASAP that would be appreciated, thank you.

:)