Debugging for Facebook and Instagram typically involves addressing API, SDK, or integration issues. Here's a concise overview:

1. Debugging Facebook API Issues

Scenario: You’re making a POST request to the Facebook Graph API but receiving a (#200) Permissions Error.

Debugging Steps:

1. Check API Endpoint & Parameters: Ensure you’re using the correct endpoint and have included all required parameters.

   {
       "error": {
           "message": "(#200) Permissions Error",
           "type": "OAuthException",
           "code": 200,
           "fbtrace_id": "ABC123" }.                 }

2. Inspect Access Tokens:

   • Use the Facebook Access Token Debugger to verify:
     • Token validity.
     • Permissions granted to the token.
     • Expiry status.

3. Verify App Permissions:

   • Go to your app’s dashboard in the Facebook Developer Console.
   • Ensure you’ve requested the right permissions (e.g., pages_manage_posts, ads_read) and have them approved.

Reporting to Facebook:

• Go to the Facebook Bug Reporting tool.
• Provide:
  • Error message details.
  • API endpoint used.
  • Access token type and scopes.

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2. Debugging Instagram Graph API

Scenario: You’re fetching user media but getting a 400 Bad Request response.

Debugging Steps:

1. Validate API Version: Ensure you’re using the latest Instagram Graph API version. Example endpoint:

   GET https://graph.instagram.com/me/media?fields=id,caption&access_token=YOUR_ACCESS_TOKEN
   

2. Check Scopes:

   • Use the Instagram Graph API Access Token Debugger.
   • Confirm that required permissions (user_media, user_profile) are granted.

3. Test with Graph API Explorer:

   • Use the Graph API Explorer to simulate the request and analyze the output.

4. Inspect Request Payload:

   • Check if all required fields are being passed correctly.

Reporting to Instagram:

• Visit the Instagram Graph API Bug Report.
• Submit details including:
  • API endpoint and request payload.
  • Full error response.
  • Steps to reproduce the issue.

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3. SDK Debugging for Both Platforms

Scenario: Facebook Login SDK is not redirecting correctly.

Debugging Steps:

1. Verify App Setup:

   • Check the Redirect URI in your app’s Facebook Developer Console.
   • Ensure the URI matches your app’s configuration.

2. Enable Debugging Mode:

   • Add the following to your SDK initialization code:

     FB.init({
         appId: 'your-app-id',
         cookie: true,
         xfbml: true,
         version: 'v12.0'
     });
     FB.AppEvents.logPageView();
     

3. Inspect Console Logs:

   • Open browser dev tools and check for SDK-related errors.

Reporting:

• Use the Facebook Support Dashboard.
• Include:
  • Screenshots of the issue.
  • Steps to reproduce.
  • Logs from the browser console.

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Key Tools for Debugging:

• Access Token Debugger: Analyze tokens for Facebook and Instagram.
• Graph API Explorer: Test API calls interactively.
• cURL/Postman: Test API requests outside of your application to isolate issues.
• Browser Console: Debug JavaScript SDK errors.

If you provide specific details or code snippets, I can offer tailored guidance!

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