I downloaded the new launcher, but each time I try to sign in with the migrated Microsoft account, the launcher closes (see attached video). It does not open any other window or application; it does nothing at all. I've made sure that I'm signed in to the Microsoft account on my browser and my computer but it hasn't made any difference. Because I've migrated my account I can no longer sign in using the Mojang option. I've also uninstalled the old launcher because I though that that was causing the problem so I'm practically shut out of the game for now.