How do you get long-lived access tokens from the Facebook Graph API (server-side auth)?

Question

Since Facebook is removing the offline_access permission, I want to go ahead an migrate our website to use the new system.

I found this document on Facebook\'s website:

Answer 1

Since Facebook is removing the offline_access permission, I want to go ahead an migrate our website to use the new system.

Ensure you enabled "Remove offline_access permission" in the advanced settings of your app

If you did, you might be hitting a bug https://developers.facebook.com/bugs/378106708911903