When I attempt to log into the launcher, it opens what seems to be Xbox and a window that becomes blank after a brief loading screen.

When I attempt to log into the launcher, it opens what seems to be Xbox and a window that becomes blank after a brief loading screen. I have tried to use the Mojang login but failed. This happened right after updating the launcher to what seems to be the latest version, and I hadn't opened the launcher for a while at that point. Exiting showed no error message, and there was a slider at the bottom of the white window once loaded. This new launcher login interface was unfamiliar to me due to my lack of time playing the game leading up to that point.