Error 500 on dialog/oauth API after today's push at 8:21

Question

Our apps are getting error 500 on this call :

https://www.facebook.com/dialog/oauth?client_id=89dc1edc0036d868930ccbac657e8b7f&redirect_uri=https%3A%2F%2Fapps.fa

Answer 1

I can reproduce your problem by removing all cookies at facebook.com and then visit your posted link.

If you visit http://www.facebook.com once, then your URL will work. If found it now needs a cookie at facebook.com to work (named datr at facebook.com). There must be a change/problem at facebook.

It also works if you visit the corresponding login.php directly.

Answer 2

Depending on what oauth tool you're using, it's possible to get an error 500 if the API key and/or secret are missing

Answer 3

Facebook seems to have dropped support for the old API KEYs. If you look at your App Settings page, you'll see App Id/Api Key. These were merged back in 2011, so just replace your api_key with your app_id for the client_id parameter.

This should have been a breaking change.