Minecraft doesn’t make me do stuff

i was playing. Then it said that it signed me off my xbox account. So i put my account. And then, it said there was a problem with my account. I fixed it, and put my account in minecraft. But then when i checked if i can add friend my sister and her friend,
it said that i cannot add friend people because of how my xbox account was set up. i didnt wanna make a new account because i built lots of mansions. And before, this wasn’t happening.

can you help me how to fix this problem without changing my account?

:)