Fix Facebook Login Integration Issue

@adeelpirzada

Hi, I am Adeel. I have debugged OAuth and token exchange issues on production systems built on ASP.NET and Node, including redirect URI mismatches and expired app secrets that break Facebook Login after a policy update. I would start by checking the app dashboard settings, valid OAuth redirect URIs, and the token exchange response, since that is where most breaks after a Facebook policy change happen. Once fixed I will confirm it in production and send you a short note on what changed so you can maintain it going forward. Is the app currently in live mode or still in development mode on the Facebook dashboard?

@GetReal

Hi Harry, I have a deep understanding of the Facebook Login SDK, OAuth 2.0 and I am quite familiar with the Facebook App dashboard- precisely what you need to trace and fix where your flow is broken. My intimate knowledge of these systems will allow me to quickly identify whether the problem lies in the front-end callback, redirect URI, app settings or token exchange codes.

@starttechno

I’ll trace the Facebook hand-off from the existing login button through the redirect URI, callback, and token exchange, then fix the exact break instead of replacing a working integration. I’ll review the PHP/JavaScript flow alongside the Facebook App dashboard, including Live mode, Valid OAuth Redirect URIs, App Domains, permissions, Graph API compatibility, and any access-token exchange issue caused by a recent policy or API change. Within 1 day, I’ll apply the required code or configuration changes, verify the complete login and return flow in production, and provide a concise summary of what changed for future maintenance. Is the Facebook App currently in Live mode, or is Facebook showing any warning in the dashboard? Muhammad Saad

@extreamcode

Hello there, The hidden failure point is usually not the Facebook button itself, but a mismatch between OAuth redirect settings, callback handling, or token validation after a platform update. I can trace the complete Facebook Login SDK and OAuth 2.0 flow, inspect the Facebook App dashboard, then fix the front-end callback, redirect URI, or server-side token exchange as needed. Using PHP, JavaScript, MySQL, and Web Development experience, I’ll verify the correction in production and document the exact changes for maintenance. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Which exact error or callback URL is being returned when Facebook redirects users back to your platform? Best regards, Asad Which error appears in the browser, server logs, or Facebook redirect response, and have the App ID, secret, domains, and redirect URIs changed recently? Are you using the Facebook JavaScript SDK, a backend OAuth flow, or both? Looking forward to your reply so we can finalize the exact plan.

@Synet

Hi, Your Facebook Login integration is failing during the hand off and return steps, which likely stems from recent changes in the Facebook App dashboard settings, redirect URI mismatches, or token exchange limits in your PHP and JavaScript code. I will trace the OAuth 2.0 flow from the button click through the API handshake to find the exact line where the request fails. Once the broken point is isolated, I will update the code and server configuration to match current Facebook API rules so users can authenticate again. As an extra step, I will check your active app permissions and API version settings in the Facebook developer console to prevent sudden breaks when Meta rolls out future updates. You will be able to test the login flow directly on your live product while I document every single file change in a clear list. Are you seeing any specific error code on the Facebook side or a blank page when the redirect happens? Best, Salma Noreen

@jafarali14

Hi, When Facebook Login suddenly stops completing, the issue is usually somewhere between the OAuth redirect, callback handling, Meta App settings or server-side token exchange. I can trace the complete flow and fix the actual failure rather than applying a workaround. I’m an Expert Full-Stack Developer with 8+ years of experience with OAuth 2.0, Facebook Login, APIs, PHP, Laravel, JavaScript and authentication systems. I can handle: Trace the complete Facebook OAuth flow Check frontend SDK and callback handling Verify exact OAuth redirect URI configuration Review Meta App settings and permissions Debug authorization code and token exchange Check API/SDK version compatibility Verify state/session handling and authentication mapping Apply required code or dashboard configuration fixes Test the complete flow in production Provide a concise maintenance summary The OAuth callback URI must match the registered URI used by the application, and the authorization code must be exchanged correctly for an access token. If you provide the current code/repository, Meta App configuration and the exact error or callback response, I can start by reproducing the failure and identifying the breaking point. I’ll then fix it, test login with a real Facebook account and confirm the production flow works end to end. Let’s get the existing Facebook Login working reliably again without disturbing the rest of your authentication system. Thanking you, All the very best, Cheers!!

@Fazeennazar

Hello I checked your project and the main point is to restore the Facebook OAuth login flow, identify whether the issue is in the callback, redirect URI, app settings, or token exchange, then verify it in production. In the past I built PHP web applications with third-party API integrations, authentication flows, and database-backed user access. I can review the Facebook App Dashboard, SDK usage, OAuth 2.0 parameters, access tokens, and the existing PHP or JavaScript callback code. I would first trace the browser request and server response, then compare the configured redirect URI and app mode with the values used by your platform. After applying the fix, I’ll test successful login, error handling, and account linking, and provide a short maintenance summary. Could you share the current error message and confirm whether the issue affects all users or only production? It would also help to know whether the application recently changed its Facebook SDK or API version. Best regards.

@naminghn

Hi there, I understand that your Facebook Login flow is currently failing, preventing users from authenticating. My experience with OAuth 2.0 and the Facebook Login SDK positions me to effectively trace the breakdown in the current flow, whether it's in the callback setup, redirect URI, or token exchange process. Once I diagnose the root issue, I will implement the necessary code or configuration adjustments and ensure the solution is validated in production. I'll summarize the changes made, empowering you to maintain it moving forward. I'm ready to help resolve this issue so your users can log in smoothly again. Regards, Ali

@denisSolution

Hi, I'm Denis, a full-stack developer specializing in OAuth flows and third-party integrations. I've debugged numerous Facebook Login issues caused by SDK updates, redirect URI misconfigurations, and token exchange problems. I understand the issue: your login flow broke during the handoff between your app and Facebook. This typically stems from outdated Facebook SDK versions, misconfigured redirect URIs, changed app settings, or incorrect backend token exchange handling. I've resolved similar issues by systematically checking front-end callback handling, verifying redirect URIs match exactly in your code and Facebook App dashboard, reviewing OAuth token exchange logic, and confirming app permissions are current. Facebook's frequent updates often break outdated implementations. My approach: I'll review your current implementation and Facebook App configuration to pinpoint where the flow breaks, trace the OAuth handshake, check token response handling, and apply necessary fixes. Then I'll test end-to-end in production and document all changes. Key focus areas: ensuring redirect URI consistency everywhere, updating the SDK, and validating backend token exchange. I'll ensure everything is clear for future maintenance. I'm available to start immediately. Let's discuss the details. Thanks, Denis.

@webcast

Hi there, I understand your Facebook login flow has broken — likely due to changes in OAuth redirects, token handling, or app settings after a recent API update. I’ll trace the hand-off from button click through callback and token exchange to pinpoint where it fails, then apply the necessary fix and confirm it works in production. I’ve resolved similar Facebook login breaks quickly after API changes, restoring auth without disrupting live users. Quick question — are you seeing any specific error in the browser console or network tab when the login fails? Looking forward to hearing from you. Webcast Technology

@tech4mage

Hi, I can help troubleshoot and fix the existing Facebook Login flow without unnecessarily changing the current implementation. I have 13+ years of PHP/web development experience and have worked extensively with APIs, OAuth-based authentication, third-party integrations, callbacks, tokens, and server-side debugging. I’ll trace the complete login flow from the frontend button through Facebook, callback/redirect handling, authorization code and token exchange, and finally user authentication on your platform. I’ll also review the Facebook App settings, valid OAuth redirect URIs, domains, App Mode, permissions, API/SDK compatibility, and any recent changes that could have affected the flow. Once the issue is identified, I’ll apply the required code/configuration fix, test the complete flow, and verify it in production. I’ll also provide a short summary of the root cause and changes made so the setup is easier to maintain. I’m comfortable working with existing codebases and can start quickly. If you can provide access to the relevant code and Facebook App settings, I can begin with the diagnosis. Regards, Ishan

@intelliresponse

Hi, Usually this is caused by a redirect URI mismatch, outdated SDK/API version, incorrect App settings, or a broken token exchange. 1. Facebook App Dashboard – verify App ID, App Mode, OAuth settings, valid redirect/callback URL, domains, and allowed origins. 2. OAuth callback – check whether Facebook is actually returning the code to your platform. 3. Token exchange – verify the backend exchanges the code correctly and uses the current Facebook Graph API/SDK version. 4. User authentication – confirm the returned access token is valid and the user data is retrieved correctly. 5. Production testing – test the complete login/logout flow in production and check server/browser logs for the exact failure.

@technologiesit

Having successfully delivered over 200 projects, including intricate Facebook API integrations, I am confident in my ability to fix the login issue you're facing. With my extensive knowledge of OAuth 2.0, the Facebook Login SDK, and the Facebook App dashboard, I'll be able to trace the exact point where the flow breaks and swiftly apply the necessary fixes. My proficiency is beyond just fixing issues; I assure you that with my problem-solving skills, this problem's recurrence would be minimized if not eradicated. After rectifying the issue, I'll also provide you with a concise update on what was changed so that you can easily manage it going forward. Moreover, my diverse skill-set comprising JavaScript, MySQL, PHP alongside my dedication to delivering secure and scalable code aligns perfectly with your project requirements. Not only will your "Log in with Facebook" feature be restored but also optimized as I pay equal attention to performance optimization. Let's connect and get your application back to functioning at its best!

@PINESCRIPTERR

Hi, I can troubleshoot the existing Facebook Login flow end-to-end, tracing the OAuth hand-off from the frontend through the Facebook App configuration, redirect/callback handling and token exchange to identify exactly where authentication is failing. I’d make the required code or App Dashboard changes, test the complete login and callback flow in production, and document the final configuration so the integration remains maintainable. Question 1: What backend/framework handles the current Facebook OAuth callback and token exchange, and can you provide the relevant repository or authentication code? Question 2: Do you have the current Facebook App ID and access to its Meta App Dashboard, including the configured redirect URIs and login settings? Regards, Houssame.

@javaidh390

Hi, I'll fix this issue for you and have previously worked on these kind of issues. I'm available to do it right now. Thanks!

@deependra4113

Hi, Honest note upfront: I don't have documented hands-on work with the Facebook Login SDK specifically, though I have solid general OAuth 2.0 and third-party auth integration experience (Firebase Auth, various SDK integrations) across 9+ years of mobile development. Wanted to flag that rather than overclaim deep Facebook-specific expertise. What I can bring: a methodical debugging approach - checking the Facebook App dashboard settings (valid OAuth redirect URIs, app domains, platform configuration), verifying the client-side SDK call and callback handling, and tracing the token exchange step to isolate whether the break is in redirect configuration, a deprecated API version, or a changed permission/scope requirement (Facebook has tightened several of these in recent policy updates). If you're open to a developer who'll investigate systematically rather than someone with a specific "I've seen this exact error before" answer, I'm confident I can trace and fix this, and I'll document clearly what was wrong and what was changed so you can maintain it going forward. Could you clarify: is this a web app, mobile app, or both? That affects whether the issue is likely SDK-version-related or redirect-URI/dashboard-configuration-related, and I can scope more precisely once I know. Best, Kalyan

@arslanshahid386

Hi, I understand that your "Log in with Facebook" feature has encountered issues, preventing users from authenticating through their Facebook accounts. This problem seems to stem from the hand-off process between your platform and Facebook, which is no longer completing successfully. The main technical challenge here is identifying the exact point where the OAuth 2.0 flow is breaking down. My approach would involve first reviewing the Facebook App dashboard settings and the current implementation of the Facebook Login SDK within your platform. Ensuring that all API calls are correctly configured and up-to-date is crucial for restoring functionality. With extensive experience in PHP, JavaScript, and integrating third-party authentication systems, I have resolved similar issues in the past, ensuring seamless user authentication experiences. Q1 – Have there been any recent changes to your Facebook App settings or platform code that could have triggered this issue? Q2 – Are there any error logs or specific error messages being generated during the failed login attempts? Q3 – Is the Facebook App set up in development mode or live mode, and are the necessary permissions approved? Looking forward to hearing from you.

@Shahmeer9090

Hi There, I can help you resolve the issue with your “Log in with Facebook” flow. As a web developer with over 10 years of experience, I am well-versed in the Facebook Login SDK, OAuth 2.0, and the Facebook App dashboard. Here’s how I can assist you: 1. **Trace the Break:** I will meticulously investigate where the authentication flow is breaking—whether it’s in the front-end callback, redirect URI, app settings, or during the token exchange. 2. **Apply Fixes:** Based on the findings, I will implement the necessary code or configuration changes to restore the Facebook Login functionality. 3. **Confirm Solution:** After deploying the fixes, I will test the solution in production to ensure everything works smoothly. Additionally, I will provide you with a brief summary of the changes made so you can maintain the updates going forward. Having dealt with similar issues, particularly in the context of Facebook API or policy updates, I understand the nuances involved and can provide effective solutions. Let’s discuss your requirements in more detail to get this issue resolved quickly. Thanks, Shahmeer Ahmed Khan [My Freelancer Profile](https://www.freelancer.com/u/Shahmeer9090)

@azaqero

Hello I fixed a logic auth problem years ago. So I feel confident I can fix on your site. Let me know your url to double check first