Omniauth facebook authentication failure Invalid application Id

[Ashish Singh]

I am trying to authorize my rails application using omniauth-facebook gem.

But I am seeing this error.

(facebook) Authentication failure! invalid_credentials: OAuth2::Error, : 
{"error":{"message":"Error validating application. Invalid application ID.","type":"OAuthException","code":101}}

I have a stackoverflow question for this.

Can anyone help me with this issue.

Ashish Singh