Ok. Is the app working now Bosco?
My Aura migraine app didn't work for me on my Samsung tablet and crashed, so i enabled camera and than it worked.
Also, it didn't worked on my lenovo p2 android 7, but also there i have to enable camera for the app in permissions and then it worked.
This have something to do with Google new neardy permission security policy, so several users seems to not get permission hints from the app since the upgrade policy from google, where apps in google play store, demands every app to target api26.
I am working on a solution.
Regards Bob