Minecraft error code ghast is making it annoying to sign in.

Minecraft often signs me out of my account and when i go to sign in, it tries to get me to sivn on to my old account which is in the process of being deleted. I try to sign in using my new email and it tells me Code:GHA st. I can fix this by UNINSTALLING AND REINSTALLING THE GAME. But its an everyday type of occurrance. I can sign onto my account just fine on the Xbox app itself on my phone. I can't remember how to save my worlds to my phone instead of to the app, if i did this wouldn't be as annoying. Restarting my phone pretty closing the app does not help.