I cannot play minecraft

I am getting an error that my Minecraft cannot verify that I have any products, so I should check my internet connection, but I can use Lunar Client and watch YouTube, so the launcher is broken. When I try to load up the game, it says cannot launch Minecraft. When it loads up the window, it crashes. Update, now, on the Minecraft.net website, it is saying I need to buy the game again, but when I click buy now, it brings me back to my Already own Minecraft? Download it again!