Facebook redirect url issue OAuthException

Question

My app was working well for long time, but now I am getting the error from Facebook saying:

Content: {\"error\":{\"message\":\"Error validating verification c

Answer 1

It's important to note that if you use https:// however in your login URL you are using http://, then it will throw a OAuthException about a url issue.

So you must use https:// in your login URL if you are using it.

This solved my problem.