Are you getting anything other than that, as thats just a URL rather than an error
In answer to your questions
1) Facebook are actually making it increasingly difficult to integrate with. We are still working with it for the moment
2) The review process is something you will indeed likely need to do with facebook these days. Whether or not you decide to continue with it, only you can answer
3) Yes, you can. You would certainly need review for that. There is a link on how to do this here.
Anything which is to be deprecated you can find here