Xbox Live logs me off when changing games

Hey mate, do the following and should fix it:

Delete the profile from the console (profile only), clear the system cache, restart the console and re-download the profile.

Delete and re-download profile:
support.xbox.com/.../profile-move-delete

Clear system cache:
support.xbox.com/.../clear-system-cache

I can connect to xbox live, but when I try to play a game any game it will log me out and prompt me to sign in again to play game. When I exit the game it will do the same thing log off and need to log on again, this is on every game. Now today it connects
to live, but I try to play an online game it kicks me from live, exit the game and and it will log back into live. What is going on with XBOX

On second thought, if that person is still logged into Xbox Live, would that prevent me from changing my gamertag? Would I just have to wait it out until they log off for me to change it?

I get the same code , but only after last update , when I log in to my account it logs in then when I try to play a online game or get invate to play with friends it logs me out of Xbox live . Really starting to me *** off . MY xbox worked fine before the
update and now it doesn't work at all . You pay for Xbox Live you should be able to use it . When and if they fix it do we get the time we lost back ???

I tried both solutions but the epic games launcher isnt the problem if seems something is off with my cbox live because i can log into xbox live but when i try to log into xbox games through xbox it doesnt allow it but I can log into other accounts through
epic games but now through xbox?