[Solved] Facebook Login requires UniqueID on version 2.1.8
I have followed the instructions here: blog.vanillaforums.com/facebook-application-for-vanillaforums-sso/
and many other posts. None of them resolve this issue. My facebook app is NOT sandboxed. I made sure there are no leading or trailing white spaces. My server has cURL enabled.
I am at a complete loss and have been working on this for two days now.