@MojangSupport I'm trying to access my account and when I attempt to sign in under Microsoft, I'm presented with this. I've refreshed the page multiple times, but it just gives me the Minecraft logo with the Microsoft window below it blank.

If you could, can you try using another browser and/or device to see if that helps? Also, I'd highly suggest clearing your cache and cookies! ^BT

Browser seems to be what was causing the issue. I temporarily switched over to Edge and it allowed me to log in.