I have made a app in apex.oracle.com i am trying faceboook authentication

It shows..it shows the message.

Sorry, something went wrong.

We're working on getting this fixed as soon as we can

This is the application.

https://apex.oracle.com/pls/apex/magazinecrm100/r/cap20/login?session=116674402245383

Following is the process i followed to set facebook authentication.

I had setup the facebook login in developers.

i set the call backup url to

https://apex.oracle.com/pls/apex_authentication.callback

goooot the userid and passworod and set the web credetnails

4599221416982

and then i have set to the web credentials

and then authen tication scheme

Where can i be wrong i suspect it can be facebook developers account ..having issue..its unverfied could that cause the issue.