invalid subscription??

this has happened a few times now, it was fine for a few days again and then it happened again and I have no idea what to do.

So on the screen it asks if I own the app whenever I open the Minecraft launcher.

I have bought Minecraft in 2021 from amazon (for about 20€) where I got a code that I had to enter on (I think) the website of Minecraft.

apparently I don't have a valid subscription but I don't recall there being a time limit for the minecraft launcher.