My Minecraft Launcher can't access my Minecraft Account

I was booting up my launcher when I saw the “Buy Now” button instead of the usual Play. Before this I could log in perfectly fine and hop on to the account. Now it just says I have to buy Minecraft again. During all of this there was a notification to “restart my connection”. So I did, and when I came back the same thing. My minecraft launcher read my macbook as never having minecraft before. I’ve tried looking into the files and all of my old data is still on there, my mods my plugins etc even my skin! But for some reason the launcher won’t detect my data, insisting “Buy Now”. It could be my internet but I’ve changed to different networks already. You can see in the attachment where I played Minecraft before, logged in on servers too.