Minecraft "Unpurchased", Uninstalled?

So I bought Minecraft about 2 months ago and I was playing a Minecraft server. Then I got kicked from the server for a reason I've never heard of. Somehow my launcher says I don't have Minecraft and it says "play demo" instead of the normal play button, I'm on the latest version of Minecraft as of now, 1.16.5. I also have to note there is a small message at the bottom of my Minecraft Launcher application that says "Oh no! Something went wrong, and we couldn't connect to the Minecraft services" and it tells me to try again but it's not working, there is also nothing wrong with my internet connection. I bought Minecraft from a coupon code too, if that has anything to do with it.