Camera should be sufficient. What do you see when you try to scan a code?

I don’t actually scan codes myself. But our techs have reported receiving the following error:

Tried this in my app and don’t get a camera picture nor an error...

All available permissions are granted to the app. On Android it works.

thank you. I have one more question, what is the Background Apps permission option for? 

The app is always allowed to run in the background—receive info, send notifications, and stay up to date—even when you’re not actively using it. However, it might use more power as a result.