Bought Minecraft, but it doesn't even show my avatar and username anymore, and shows demo.

So, I already bought Minecraft a very long time ago, and I played it for a long time, not having any problems. Then I found Badlion and Lunarclient a few years later, so I played on Lunar, and I still do today. But then sometime after that, I tried going to the original launcher, and I had a Microsoft account by then, and when I opened it up, I noticed something weird. I was signed out, and my avatar was gone. I tried logging in, and it was successful, but instead of seeing the Play button, I saw a Play Demo button. There was also a error sign on the bottom of the screen. It didn't show my username, and showed Player instead, and I didn't have any of my skins. I still had all of my installations, but that was it. It is still like that today, and I am still trying to fix it today. I have tried every single possible fix solution, and no luck. It has been like 2-3 years or something, and no success in playing with the Minecraft launcher. I can still play on Badlion and Lunarclient though, so I am still able to play Minecraft. Please help me anyone!!! I have proof that I own Minecraft already down below. (Also, just now I realized that it said that the launcher is offline. Does that change anything?)