[RESOLVED] I can't use my new Java and Bedrock launcher

Edit: FIXED (I apologize, I don't know how to mark a report as fixed.)

A few days ago, I got the new combined Java and Bedrock launcher. After I log in with my Microsoft account (with Xbox), the launcher says, "Play Demo" instead of "Play", as it usually does. And it gives me this message at the bottom of the screen: "Oh no! Something went wrong, and we couldn't connect to the Minecraft services." I've tried almost every solution I searched/I thought of, and they all don't work. I have attached an image of my login screen.