I tried to pair my wallet using the QR code but it just keeps loading. Why is this happening?

To pair wallets via a QR code scan, you need to use the QR code displayed at Tools > Pair Devices > Display Pairing Code. This code represents your backup phrase, and therefore backs up all wallet assets. Any attempt to pair devices using the QR codes on the main wallet screens will be unsuccessful, as they only represent one public address.