Facebook GraphAPIVersion 3.0
Facebook GraphAPIVersion 3.0

Facebook only provides graphApiVersion 3.0 for new apps. Therefore, it should also be adapted in the file. Otherwise you get a 500 error on your login/reg screen.
flarum/auth-facebook,flarum/flarum-ext-auth-facebook,flarum/flarum-ext-auth-facebook,flarum/facebook,flarum/auth-facebook,flarum/facebook,flarum/facebook