How to Fix HTTP 400 Error on Roblox

Keep seeing an HTTP 400 error code on Roblox?

One of the worst things that could experience while using Roblox is when the platform refuses to work correctly. This can delay the games you’re currently making or get in the way of your scheduled gaming session. 

Now, there are a handful of error messages and codes on Roblox. However, we’re going to talk about the HTTP 400 error for this specific guide.

Based on what we know, this problem on the platform randomly occurs during use. 

Usually, the HTTP 400 error pops up when a request made from your device to communicate with Roblox’s servers becomes invalid or incorrect. Nonetheless, there are still several reasons why this error code occurs. 

To help you out, we’ve decided to make a guide for fixing the HTTP 400 error code on Roblox. 

Let’s get right into it!

1. Check Roblox Servers. 

The first thing you should do when you run into the HTTP 400 error code is to check where the problem is coming from. You can do this by going to Downdetector to check the current status of Roblox. 

Roblox Server Status

If there’s an ongoing issue with Roblox, you don’t have to do anything on your end since the issue is server-related. 

However, if Roblox’s servers are working fine, proceed to the next method below to start troubleshooting the problem on your side. 

2. Check Your Network Connection. 

The HTTP 400 error code usually occurs when Roblox can’t communicate with its servers. One reason behind this could be a slow or unstable internet connection.

To check if your network is the culprit, run a test using to see how your network is currently performing. 

HTTP 400 error on Roblox

If your internet connection is running slow, reboot your modem or router to refresh the connection with your service provider. Disconnect your router from the wall outlet and wait for at least 5 seconds before plugging it back in. 

HTTP 400 error on Roblox

Once done, perform another test to see if your network is now running properly. If not, contact your service provider and ask them to fix the issue. 

3. Allow Roblox to Your Firewall. 

Windows Firewall is a security feature on Windows that controls the access of applications and programs to the internet. If you encounter the HTTP 400 error on Roblox, it may indicate that your firewall is blocking Roblox from accessing your network. 

To fix this, follow the steps below to allow Roblox to your network: 

  1. First, go to the Start Menu and look for Windows Defender Firewall
  2. After that, click Open to launch Windows Firewall
  3. Next, choose the ‘Allow an App or Feature Through Windows Defender Firewall’ option on the side menu. 
  4. Lastly, ensure that Roblox is allowed to your Private and Public Networks
Allow Roblox on Firewall

Try running Roblox again to check if the problem is solved. 

4. Turn Off Your Antirivurs. 

Third-party antivirus is great for protecting your system from harmful and malicious files and programs. However, some antivirus software can get too protective and flag down legitimate applications. 

If you keep running into an HTTP 400 error code on Roblox, your antivirus could be restricting Roblox from accessing the internet. 

To avoid this, disable your antivirus while playing Roblox or add the platform to your whitelist or allowlist. 

5. Disable Your Extensions. 

Roblox displays advertisements on their website to earn some revenue to maintain their servers. If you are using any ad-blockers or similar extensions, turn them off before accessing Roblox’s website. 

See the steps below to disable extensions on your browser: 

  1. First, go to the Settings of your browser. 
  2. Next, click on the Extensions tab from the side drawer. 
  3. Lastly, disable all your extensions and restart your browser. 
HTTP 400 error on Roblox

Go back to Roblox afterward and see if you would still encounter the HTTP 400 error code. 

6. Clear Your Browsing Data. 

Another reason why you see the HTTP 400 error on Roblox is if your browser’s temporary data got corrupted. Browsers store cookies and caches to your system, which are used to speed up the loading times of websites. 

However, caches and cookies can accumulate over time and get corrupted. When this happens, your browser and the sites you visit may not work properly. 

Here’s what you need to do to clear your browsing data: 

  1. On your computer, launch your web browser and access the Settings
  2. After that, scroll down to Privacy & Security and click on Clear Browsing Data
  3. Now, change the Time Range to All Time and include caches and cookies in the process. 
  4. Finally, hit the Clear Data button to start. 
HTTP 400 error on Roblox

After clearing your browsing data, go back to the platform and see if the HTTP 400 error code on Roblox still occurs. 

7. Try Again After a While. 

If you still see the HTTP 400 error code on Roblox, the only thing we can recommend is to try using the platform at a later time. Roblox might have an issue that hasn’t been reported yet or their team is performing system maintenance. 

Simply continue with other things that you need to do and remember to check in from time to time to see if the HTTP 400 error on Roblox is already resolved. 

That ends our guide on how to fix this specific issue on Roblox. If you have questions about the solutions, don’t hesitate to leave a comment below, and we’ll get back to you as soon as possible. 

If this guide helped you, please share it. 🙂


  • John Sixto

    John is a staff writer at Saint and comes from a SAP ABAP development background. He has a Bachelors in IT and has been writing since 2018, with over 500 posts published. He loves to build PCs and has a deep curiosity in understanding how different components and configurations work. John spends hundreds of hours at a time, researching and testing the software and apps, before he proceeds to write about it. LinkedIn X (Twitter) Website

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