Redirecting to authentication dialog - “An error occurred. Please try again later”

Question

Why does it always happen to me?

This happens after my application verify for user user login and redirect user to the authentication page:

https://w

Answer 1

The reason in my case was completely different. I was trying to open a Feed dialog automatically after page load. And 9 times of 10 it displayed this error. First, I added show_error: true parameter as suggested by @Peter Roome, but it didn't help, displaying 104: Invalid signature, not descriptive at all.

Then I figured out the reason. The code was in $(document).ready jQuery function. And it seems that some facebook stuff had not yet been loaded at the point the code was to be executed. I moved the code to $(window).load block (which is executed after all page content is loaded), and the problem has been solved.

Answer 2

Another possible mistake, if you directly copied the code from Facebook SDK example then you may get the same error despite of having everything correct. http://developers.facebook.com/docs/reference/php/

This is because in their example they have used backquotes instead of single quotes for the key of the array. The correct code is as follows.

require_once("facebook.php");

$config = array();
$config['appId'] = 'YOUR_APP_ID';
$config['secret'] = 'YOUR_APP_SECRET';
$config['fileUpload'] = false; // optional

$facebook = new Facebook($config);

Answer 3

I had this error because I was using redirect_url as a parameter instead of redirect_uri.

The Server-Side Authentication doc page says to use redirect_url:

https://www.facebook.com/dialog/oauth?
    client_id=YOUR_APP_ID
   &redirect_url=YOUR_REDIRECT_URI
   &scope=COMMA_SEPARATED_LIST_OF_PERMISSION_NAMES
   &state=SOME_ARBITRARY_BUT_UNIQUE_STRING

But this is incorrect. The OAuth Dialog doc says to use redirect_uri instead, which works, so I'm assuming that you can only use one and not the other:

https://www.facebook.com/dialog/oauth/?
    client_id=YOUR_APP_ID
    &redirect_uri=YOUR_REDIRECT_URL
    &state=YOUR_STATE_VALUE
    &scope=COMMA_SEPARATED_LIST_OF_PERMISSION_NAMES

Answer 4

I was getting this error because I was starting from http://mysite.com, but had specified http://WWW.mysite.com in my Facebook settings - the www mattered... I ended up solving by using .httpaccess to always kill the "www", and pointing FB to http://mysite.com

worst. subdomain. ever. :u)

Answer 5

I had the same problem, and fix it by adding param &display=touch to url

try, it may helps

Answer 6

This was happening to me also but all the api keys, secrets and stuff were correct. What I found is that my app was running in sandbox mode. Go to your app settings in https://developers.facebook.com/ click the advanced settings tab and check to see if your app is in sandbox mode. If it is disable it and try again. Let us know if it works.