Do ensure that you are scanning a FavePay DuitNow QR, instead of a regular DuitNow QR. The examples below illustrate the difference between both types of QR codes:
This is a regular DuitNow QR code which cannot be scanned using the Fave app | This is a FavePay DuitNow QR, and can be scanned using the Fave app to make FavePay transactions |