Facebook app is Public, but gives error “App not setup” when logging in

Question

I have an Android app using Facebook to login.

The app is already public:

Answer 1

Unlike Google, Facebook api needs a valid ssl certificate. So if your website isn't https then according to facebook you are still in development mode. Here is the link to their docs https://developers.facebook.com/docs/apps/security

For development purposes you can use the roles option (can be found on the leftside menu). In here you can enroll your self as a developer or tester to use all the live features.

Once you are done with the development you will have to get an ssl certificate. You can also use a free service like https://letsencrypt.org to get a valid certificate, facebook requires your certificate to be sha256WithRSAEncryption, i personally haven't used letsencrypt with facebook yet but they are one of their sponsors to i guess it should meet their criteria of a decent certificate.

Answer 2

I also encountered this issue because I used wrong app id and app secret. Please use valid app id and app secret.

Answer 3

1. Go to your App Dashboard.
2. Click on App Review which is located in the left side of the menu and make your app public.
3. Click "Yes".

Answer 4

If the app status says that the App is public, yet you see the error with the SDK login, create a new app and start over.

This is a bug on facebook's end.

Answer 5

1. In Settings → Basic → Contact Email → give your or any email.

2. Make sure you have a valid Privacy Policy available.

3. In the App Review Tab change:

   Do you want to make this app and all its live features available to the general public?

   to Yes.