com.facebook.sdk.core error 8

Question

This is more informative than anything. I couldn't for the life of me find anything on error code 8 when trying to access the login prompt (aka safari) when debugging my ios app. After I hit the log into facebook button in my app it would attempt to open safari then dump me back to the login page to my app. The error was being caused by the permissions array. I had the the permission "public_profile" spelled "public profile" which was throwing an error obviously. So make sure your permission are type corrected if you get the com.facebook.sdk.core error 8.

Hope that helps someone.

Vermination

Answer 1

Make sure your permissions are typed correctly

   func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) {

            if error == nil {
                println("login complete")
                self.performSegueWithIdentifier("showLogin", sender: self)

            }else{

                println(error.localizedDescription)
    //com.facebook.sdk.core error 8.
            }
        }

Vermination

Answer 2

In my case this error was caused by improper bundle id set in facebook settings of the app itself. Facebook "bundle id" is case sensitive, in my Info.plist I had uppercase product name, but in fb settings - lowercase.

Script

For me, it turned out our bundle id in production version was different and wasn't in the facebook app settings for ios. – Popularize

It solved my error thank you so much for contributing. @GameCon – Crudity

Answer 3

In my case, I was using a Facebook account that hadn't yet been added to any of the Facebook app's admins/developers/testers roles.

Profluent

Facebook itself will display an error message when you log in, to the effect that you aren't a tester for this test app. – Anstice

THANK YOU! This saved my life. – Branks

Answer 4

In my case, after spending several hours of debugging I found that I was using the API,

func application(application: UIApplication,
                 openURL url: NSURL, options: [String: AnyObject]) -> Bool {
    if #available(iOS 9.0, *) {
        FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: options)
    } else {
        // Fallback on earlier versions
    }
    return true
}

which is deprecated for iOS 9.So, I used:

func application(application: UIApplication,
                 openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool {
    FBSDKApplicationDelegate.sharedInstance().application(application, openURL: url, sourceApplication: sourceApplication, annotation: annotation)
    return true
}

Which worked for me. Hope this saves time of someone.

Forworn

Answer 5

MAN!!! In my case it was the "bio" in the parameter that was causing this error. Facebook has changed the "bio" key to "about". So anyone using "bio" in parameters should change it to "about"

Pheww!!!

Actinomycete

Bio was deprecated in version 2.8 and above I believe. I had this issue. Thanks for posting this. – Crownpiece

glad I could help! Good luck! – Actinomycete

Answer 6

In my case It was wrong version. Instead of version: "v2.7", I used version: "2.7"

Evenhanded

Answer 7

In my case it was because I listed name twice in the fields array. Assume that would apply to any field requested twice.

Peruse

Answer 8

I had the same problem. It was because I didn't implement facebook login feature. After adding that, I logged in and my problem got solved.

Uniformed

Answer 9

In my case, I was playing with the Facebook Ads API and I tried to get a field but the name was wrong.

I had insights{date_start,date_end}, instead of insights{date_start, date_stop}.

More info here.

Hope it helps anyone.

Agonist

Answer 10

In my case, I tried to get Facebook Id without logging into Facebook. Make sure you're logged into Facebook.

let accessToken = FBSDKAccessToken.current()
    if accessToken != nil {

        self.getCurrentUserFbId()
        print("LoggedIn")

    } else {

        print("Not loggedIn")
        self.loginIntoFacebook()
    }

Hope this will helpful for anyone.

Getraer

Answer 11

When it happened to me, I found that Facebook's access token was expired. Someone decided to store access token in UserDefaults and reuse it later. Of course all tokens more than ~2 months old were expired.

Egg

Answer 12

In my case it was because of GraphRequest.

The error response is

"com.facebook.sdk:FBSDKErrorDeveloperMessageKey" = "Syntax error \"Expected end of string instead of \"%\".\" at character 5: email%2Cname%2Cgender%2Cpicture"; "com.facebook.sdk:FBSDKGraphRequestErrorCategoryKey" = 0; "com.facebook.sdk:FBSDKGraphRequestErrorGraphErrorCode" = 2500; "com.facebook.sdk:FBSDKGraphRequestErrorHTTPStatusCodeKey" = 400; "com.facebook.sdk:FBSDKGraphRequestErrorParsedJSONResponseKey" = { body = { error = { code = 2500; "fbtrace_id" = AFEUYbcYP39; message = "Syntax error \"Expected end of string instead of \"%\".\" at character 5: email%2Cname%2Cgender%2Cpicture"; type = OAuthException; }; }; code = 400; };

The issue about that is https://github.com/facebook/facebook-swift-sdk/issues/309

Electrophorus

Answer 13

In my case was because of birthday,friendlists . removing them started to work.

Jefferey

Answer 14

For me just had to go facebook developer under platform and activate deep linking

Cutlor

Answer 15

In our case we were seeing this issue while trying to log in with some test account (but not all). We were not following Facebook's recommended practice:

Before you test each use case below, make sure you remove your app from your test user's Facebook account using app settings.

After we did it for the failing test accounts, we were able to log in.

Beaker