You need to add this into your head tag in HTML source
                                        
    &lt;meta property=&quot;fb:app_id&quot; content=&quot;XXXXXXXXXXXXXXX&quot; /&gt;

That is default app id.

Replace `XXX` With your app id

If you don&#39;t have an app to associate the website to, then that warning can be ignored.

For an example of a successful website which doesn&#39;t have a fb:app_id included, you can run a debug on this [stackoverflow page&#39;s URL](https://stackoverflow.com/questions/35066102/facebook-debugger-why-complaining-about-app-id-missing) within the [Facebook Object](https://developers.facebook.com/tools/debug/og/object/) debugger, you will see that it also produces the same warning message.

The posts themselves will generally appear the same as they are represented at the bottom of the debugger tool.

This means your page is missing the `fb:app_id` meta tag. 

&gt; Missing Properties The following required properties are missing: fb:app_id


You **must use the `fb` prefix** (the `og` prefix won&#39;t work!)

The meta tag should look like this (replace the app id &quot;474629550209194&quot; below with your own)

```
&lt;meta property=&quot;fb:app_id&quot; content=&quot;474629550209194&quot;&gt;
```

The meta tag is `fb:app_id` - `og:app_id` (open graph) **won&#39;t** work.

I have used `brew install openssl` to download and install openssl v1.0.2f, however, it comes back saying:

    A CA file has been bootstrapped using certificates from the system
    keychain. To add additional certificates, place .pem files in
      /usr/local/etc/openssl/certs
    
    and run
      /usr/local/opt/openssl/bin/c_rehash
    
    This formula is keg-only, which means it was not symlinked into /usr/local.
    
    Apple has deprecated use of OpenSSL in favor of its own TLS and crypto libraries
    
    Generally there are no consequences of this for you. If you build your
    own software and it requires this formula, you&#39;ll need to add to your
    build variables:
    
        LDFLAGS:  -L/usr/local/opt/openssl/lib
        CPPFLAGS: -I/usr/local/opt/openssl/include

And when I do `openssl version -a` it always gives me:

    OpenSSL 0.9.8zg 14 July 2015
    built on: Jul 31 2015
    platform: darwin64-x86_64-llvm
    options:  bn(64,64) md2(int) rc4(ptr,char) des(idx,cisc,16,int) blowfish(idx) 
    compiler: -arch x86_64 -fmessage-length=0 -pipe -Wno-trigraphs -fpascal-strings -fasm-blocks -O3 -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DMD32_REG_T=int -DOPENSSL_NO_IDEA -DOPENSSL_PIC -DOPENSSL_THREADS -DZLIB -mmacosx-version-min=10.6
    OPENSSLDIR: &quot;/System/Library/OpenSSL&quot;

How can I replace the old version with the new one? I&#39;ve searched a lot on how to do this, but the solutions online don&#39;t seem to work for me...

How to install latest version of openssl Mac OS X El Capitan

I am have a lot of difficulty trying to create a UICollectionView like in Spotify&#39;s Player that acts like this:

![a busy cat](https://media.giphy.com/media/l0NwH3XDSYhQ6l4TC/giphy.gif)

The problem for me is two fold. 

1) How do I center the cells so that you can see the middle cell as well as the one of the left and right.

- If I create cells that are square and add spacing between each cell, the cells are correctly displayed but are not centered. 

2) With pagingEnabled = YES, the collectionview correctly swipes from one page to another. However, without the cells being centered, it simply moves the collection view over a page which is the width of the screen. So the question is how do you make the pages move so you get the effect above.

3) how do you animate the size of the cells as they move

- I don&#39;t want to worry about this too much. If I can get that to work it would be great, but the harder problems are 1 and 2.
 

The code I have currently is a simple UICollectionView with normal delegate setup and custom UICollectionview cells that are squares. Maybe I neeed to subclass UICollectionViewFlowLayout? Or maybe I need to turn pagingEnabled  to NO and then use custom swipe events? Would love any help!

How to create a centered UICollectionView like in Spotify&#39;s Player

While using the [facebook debugger](https://developers.facebook.com/tools/debug/og/object/), it complains:

&gt; Warning
fb:app_id hasn&#39;t been included in the meta tags. Specify the app ID so that stories shared to Facebook will be properly attributed to the app. Alternatively, app_id can be set in url when open the share dialog. Otherwise, the default app id( 966242223397117 ) will be assigned.

I don&#39;t understand why I have such a message, since I don&#39;t have an app_id for my website, and I shouldn&#39;t need why since I&#39;m not doing any facebook connect or using any of their plugin. 

Am I missing something, or is it simply that facebook wants to push me to create an app for my website?

Facebook debugger: why complaining about app_id missing

While using the <a href="https://developers.facebook.com/tools/debug/og/object/" target="_blank" rel="noopener noreferrer">facebook debugger</a>, it complains:
> Warning
fb:app_id hasn't been included in the meta tags. Specify the app ID so that stories shared to Facebook will be properly attributed to the app. Alternatively, app_id can be set in url when open the share dialog. Otherwise, the default app id( 966242223397117 ) will be assigned.
I don't understand why I have such a message, since I don't have an app_id for my website, and I shouldn't need why since I'm not doing any facebook connect or using any of their plugin.
Am I missing something, or is it simply that facebook wants to push me to create an app for my website?

I have successfully implemented a facebook bot. It&#39;s working fine. I was trying to change the webhook url now as I have to port it to a different server with a new domain.

There is an option to change the events but I could not find and option to change the webhook. How do I change it?

[![enter image description here][1]][1]



  [1]: http://i.stack.imgur.com/X55QM.png

How do I change facebook messenger bot webhook?

Important notice:

If you register for testing, go to your profile settings and to your **interests** add **delete profile**.

Trying to login with Facebook to my [website][1]:

I get the following error: 

&gt; URL Blocked: This redirect failed because the redirect URI is not
&gt; whitelisted in the app’s Client OAuth Settings. Make sure Client and
&gt; Web OAuth Login are on and add all your app domains as Valid OAuth
&gt; Redirect URIs.

My ```settings``` (Basics) in Facebook are:

 - App Domains: openstrategynetwork.com
 - Site URL for ```website```: http://openstrategynetwork.com/

In the advanced tab, ```Valid OAuth redirect URIs``` is set to:

 ```http://openstrategynetwork.com/_oauth/facebook?close```

App is ```public```.

More settings (Advanced) here:
[![enter image description here][2]][2]


App key and secret are correct. I&#39;m using Meteor and its accounts packages. 

  [1]: http://openstrategynetwork.com/
  [2]: http://i.stack.imgur.com/UcWaO.png

Facebook login message: &quot;URL Blocked: This redirect failed because the redirect URI is not whitelisted in the app’s Client OAuth Settings.&quot;

Let me first start with saying I&#39;ve searched for an answer to this question for quite some time...

I&#39;m trying to setup Facebook OAuth to work with my application that is being developed locally on my machine.  Everything was working perfect with Facebook authorization UNTIL I moved from using `localhost` to another domain name (still local to my machine.)  Now I&#39;m getting the following error.

&gt; Can&#39;t Load URL: The domain of this URL isn&#39;t included in the app&#39;s
&gt; domains. To be able to load this URL, add all domains and subdomains
&gt; of your app to the App Domains field in your app settings.

My hosts file contains `127.0.0.1	domain.dev`  (works perfect)

My redirect in my app (using Socialite) is `http://domain.dev/auth/facebook/callback`

In my Facebook App Settings...  

 - my App Domain is `domain.dev`
 - my Site URL is `http://domain.dev/`
 - my Valid OAuth redirect URIs is
   `http://domain.dev/auth/facebook/callback`

The URL at the time of the error message is..

https://www.facebook.com/v2.5/dialog/oauth?client_id=XXXXXXXXXXXXXXX&amp;redirect_uri=http%3A%2F%2Fdomain.dev%2Fauth%2Ffacebook%2Fcallback&amp;scope=email&amp;response_type=code&amp;state=0ztcKhmWwFLtj72TWE8uOKTcf65JmePtG95MZLDD

I&#39;m at a loss of what the problem is...   
   


Screen Shot 1  
[![Screen Shot][1]][1]

Screen Shot 2
[![enter image description here][2]][2]


  [1]: http://i.stack.imgur.com/EDQBF.jpg
  [2]: http://i.stack.imgur.com/RdCKJ.jpg

Facebook OAuth &quot;The domain of this URL isn&#39;t included in the app&#39;s domain&quot;

We are being asked to set the OAuth redirect URI for Facebook (as shown below) in the instructions to set up Google Firebase to use Facebook login. 

We clicked in every menu for our app. Where is it? Could it be called something different?

From the [Firebase documentation][1]:

&gt;...make sure your OAuth redirect URI (e.g. my-app-12345.firebaseapp.com/__/auth/handler) is listed as one of your OAuth redirect URIs in your Facebook app&#39;s settings page on the Facebook for Developers site in the Product Settings &gt; Facebook Login config.


  [1]: https://firebase.google.com/docs/auth/ios/facebook-login#before_you_begin

Where does one set the Oauth Redirect URI for Facebook apps?

I am currently going through the React-Native tutorials. I began with the Getting Started tutorial, where I made a new react native project and successfully managed to run the project on my device.

I then started the [Props tutorial][1], I copied the code snippet and tried to run the project again and had the following error message show up on my screen:

![](https://i.stack.imgur.com/In8Me.png)


  [1]: https://facebook.github.io/react-native/docs/props.html
  [2]: http://i.stack.imgur.com/In8Me.png

React-Native: Application has not been registered error

I am currently developing a web application with the Facebook Graph API.

My current goal is to retrieve only posts which have a location attached.

While retrieving posts with and without location is already working, I am not able to retrieve only posts with location.

The query which retrieves both types looks like this: `&#39;/me/feed?fields=id,name,message,picture,place,with_tags&amp;limit=100&amp;with=location&#39;`

The query which should retrieve only posts with location looks like this: `/me/feed?fields=id,name,message,picture,place,with_tags&amp;limit=100&amp;with=location`

The problem I have is that with the parameter `&amp;with=location` I get an error `Uncaught (in promise) undefined` at this part of my code:


    if (response.paging &amp;&amp; response.paging.next) {
        recursiveAPICall(response.paging.next);
      } else {
        resolve(postsArr);
      }
    } else {
      // Error message comes from here
      reject();
    }

Log shows the following:

    DEBUG: -------------------------------
    DEBUG: Ember             : 2.4.5
    DEBUG: Ember Data        : 2.5.3
    DEBUG: jQuery            : 2.2.4
    DEBUG: Ember Simple Auth : 1.1.0
    DEBUG: -------------------------------
    Object {error: Object}
      error: Objectcode: 
        code: 1
        1fbtrace_id: &quot;H5cXMe7TJIn&quot;
        message: &quot;An unknown error has occurred.&quot;
        type: &quot;OAuthException&quot;
        __proto__: Object
      __proto__: Object
    Uncaught (in promise) undefined

Does anyone have a possible solution for this?

For further information how the code looks like see my [previous question][1].


  [1]: https://stackoverflow.com/questions/37621010/how-to-retrieve-all-posts-of-a-user-via-facebook-graph-api-using-promises-and-re/37621318?noredirect=1


&quot;Uncaught (in promise) undefined&quot; error when using with=location in Facebook Graph API query

I am getting this error. When I try to sign in with facebook to my app.
When I first time authentication it will correctly working. After I unistalled my application and now trying to sign in with Facebook on that I am getting this error.

**Another Issue** : After authenticate in device1 and try to login with facebook on device2 also same error is getting.

**Solution I Found :** when I remove App authentication from Facebook App Settings it is working in above scenario&#39;s but this is not an good solution how we can tell to users to do this action?

    btnFbLogin.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if(accessToken != null) {
                        boolean expires = accessToken.isExpired();
                        if(!expires) {
                            performFbLoginOrSignUp(accessToken);
                        }
                    } else {
                        LoginButton loginButton = (LoginButton) findViewById(R.id.login_button);
                        callbackManager = CallbackManager.Factory.create();
    
                        if (loginButton != null) {
                            loginButton.setReadPermissions(&quot;public_profile&quot;, &quot;email&quot;, &quot;user_friends&quot;);
    
                            if (CommonUtil.isConnectingToInternet(LoginActivity.this)) {
                                loginButton.performClick();
    
                                loginButton.setPressed(true);
    
                                loginButton.invalidate();
    
                                loginButton.registerCallback(callbackManager, mCallBack);
    
                                loginButton.setPressed(false);
    
                                loginButton.invalidate();
                            } 
                        }
                    }
                }
            });

[![Error page][1]][1]


In Facebook example also having an issue : 
[GitHub link of Facebook example][2]


  [1]: http://i.stack.imgur.com/FcoSum.png
  [2]: https://github.com/facebook/facebook-android-sdk/tree/master/samples/HelloFacebookSample

***Steps to reproduce*** : 

1. Launch the app Login with Facebook Authenticate FB profile.

2. Un_install the app and install again.

3. Now try to  Login with Facebook.
4. The above error will occur. because we already authenticated so need to access fb profile. but here we facing the issue.
5. Here already authenticated page is not showing.
6. I am using Native FB app with the device Xiaomi Redmi Note 3

Content Type	Original Author	Original Content on Stackoverflow
Question	Augustin Riedinger	View Question on Stackoverflow
Solution 1 - Facebook	Bunty	View Answer on Stackoverflow
Solution 2 - Facebook	PaulieTree	View Answer on Stackoverflow
Solution 3 - Facebook	stevec	View Answer on Stackoverflow

Facebook debugger: why complaining about app_id missing

Facebook Problem Overview

Facebook Solutions

Solution 1 - Facebook

Solution 2 - Facebook

Solution 3 - Facebook

How to create a centered UICollectionView like in Spotify's Player

How to install latest version of openssl Mac OS X El Capitan

Attributions