Hey there @seraphimrp - Sorry to hear about the setup wizard being displayed. May I ask, are you seeing something like this appear:
A repeated “Welcome to your new Discourse. Let’s get started with the setup wizard”? Also, when you click on the wizard is it taking you anywhere that you can confirm the original design you completed? If you’re able to, you could try rebuilding the container in PuTTy or SSH using to see if that helps with clearing that banner:
cd /var/discourse
./launcher rebuild app