Scanning uses the browser's camera. Depending on the message shown:
- Camera blocked: allow it for goodly.be. On iPhone: Settings › Safari › Camera › Allow, then reload the page. On Android (Chrome): padlock icon in the address bar › Permissions › Camera.
- No camera found: the device has none or the browser cannot see it. Enter the customer's 4-digit code.
- Camera already in use: close the app using it, then try again.
In the scan window, "Switch camera" toggles between front and back, and "Flip the image" helps if the QR code is shown mirrored. The 4-digit code and search by name are always available: see Add a stamp.