The ban is from 11/06/2021 for player Jagged222. Unless you haven't been playing for 2 years, or you're lying, then theres no way you just realized you're banned.
Do you have a dynamic IP on your router that keeps changing? Because it seems like it might have you assigned a banned players IP address. I suggest trying to restart your router (turn it off entirely and back on) and check if you're still banned.