I have used the Facebook plugin. It works on the web test as well as on my own iPhone. However, when I sent the app to another tester to test (using iPhone devices for testing provisioning profile), the users are getting the "Developer has not setup properly" error message.
I do not get error on my Iphone 5 (7.1 or 8.x). Both of my testers got it.
What am I be missing. I have set appery.io as the facebook setting and using the project code and the facebook code in the app REST settings.