Struggle to install Smart Radiator Thermostat E1

Hello everyone! I just bought Aqara Smart Radiator Thermostat. When I open the Aqara app and select Add Devices, the thermostat does not appear in the list at all! There is a QR code on the thermostat itself, but when I scan it, it says it’s invalid. I can’t believe this. 😔 Please help! Thank you!