FBSDK Login Error Code: 308 in Objective-C

Question

I keep getting

\"Error Domain=com.facebook.sdk.login Code=308 \"The operation couldn’t be completed. (com.facebook.sdk.login error 308.)\"\"

Answer 1

I had the same problem and fixed it refreshing the system credentials

[FBSDKLoginManager renewSystemCredentials:^(ACAccountCredentialRenewResult result, NSError *error) {

    [[[YourAuthManager manager] facebookLoginManager] logInWithReadPermissions:@[@"email"] fromViewController:nil handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {

        if (error) {
            // Handle error
        } else if (result.isCancelled) {
            // Handle cancellations
        } else {
            // If you ask for multiple permissions at once, you
            // should check if specific permissions missing
            if ([result.grantedPermissions containsObject:@"email"]) {
                // Do work
            }
        }
    }];
}];

This solution is less radical than reinstalling and you assure your users won't have to do it. My guess is that FBSDK 4.6 has some conflicts with iOS 9 system FB authentication credentials.

Edited: After some time testing it kept happening, not as often as before but it was still an issue, so we downgraded to a previous version of FB SDK. Hopefully someone finds a better solution.