@MojangSupport When I try to open Minecraft it tells me in the launcher that they cant check which products i owned and i only can play the demo version. yesterday I had no problems. I logged out and logged in again but same problem. Restarted my pc. nothing helps

If you're running into Demo Mode, please check out: bit.ly/3cluzz3 as a first step. Make sure you're using the option instead of the option! ^BT

didnt help. I migrated my Java account half a year ago without a problem. If if will sign in with Micrososoft on your link this is what it shows me