How to Fix Roblox Error Code 400 Bad Request

Want to know how you can resolve the Roblox error code 400 bad request issue?

Roblox is one of the most popular games in the world. It serves as a game creation system where players can make other games using Roblox’s proprietary game engine. 

With millions of active users, you would think that the platform is flawless. Sadly, this is not true. Like any game or application, Roblox can run into various issues like the error code 400 bad request. 

This issue usually occurs when there’s a problem with your internet connection. However, it can also be due to server-related errors, incorrect network settings, or outdated software. 

Today, we will show you what to do if you encounter the Roblox error code 400 bad request issue. 

Let’s jump right in!

1. Restart Your System. 

If you encounter the error code 400 bad request issue on Roblox, the first thing you should do is restart your system. This will ensure that the problem is not caused by a temporary bug or glitch that occurred on your computer during use. 

Here’s what you need to do: 

  1. Press the Windows key on your keyboard to open the Start Menu
  2. Now, access the Power Options tab. 
  3. Finally, click on Restart to reboot your system. 
roblox error code 400 bad request

Once done, go back to Roblox and check if the problem is solved. 

2. Check for Server Issues. 

Being an online platform, Roblox relies on its servers to deliver content and services to end users. If the servers are offline, it might explain why you encounter the error code 400 while playing. 

To confirm this, visit Roblox’s status page and see if there are reported problems with the game or servers. 

roblox error code 400 bad request

If the servers are down, the only option you have is to wait. Sadly, server-related issues can’t be resolved on your end. On the other hand, you can head to the next solution if there’s nothing wrong with the game. 

Related: How to Fix Server Lags on Roblox

3. Check Your Network. 

Slow or unstable internet could also be the reason you encounter error codes while playing Roblox. To confirm this, run a test on your network using to measure its current bandwidth. 

Speed Test

If the result indicates a problem with your connection, restart your modem or router to refresh the link with your ISP. Unplug your router from the outlet and wait for at least five seconds before plugging it back in. 

Restart Router

Once done, rerun the test to check if the problem is solved. If not, contact your provider and ask them to fix the issue. 

4. Disable Your Antivirus. 

If you are using antivirus software on your computer, we recommend turning it off before using Roblox. Possibly, your antivirus is being too protective and blocks Roblox from connecting to the game servers. 

You can also add the game to your antivirus safelist or whitelist if it has this feature. This way, your antivirus will know that Roblox is safe and should not be restricted. 

5. Update Your Network Drivers. 

Faulty or outdated network drivers could also cause connectivity issues to your computer. If you still encounter the error code 400 bad request on Roblox, try updating your computer’s network drivers. 

See the guide below to update your drivers: 

  1. On your keyboard, press the Windows + X keys to access the Quick Menu
  2. Now, go to Device Manager
  3. Look for Network Adapters and expand it.
  4. Right-click on your controller and choose Update Driver
  5. Follow the prompts to continue. 
roblox error code 400 bad request

Restart your computer after the update to apply the changes. Try playing Roblox afterward to check if the problem is solved. 

6. Update Windows. 

The version of Windows you’re using might have an underlying issue that is related to network connectivity. To rule out any problems, update your operating system to the latest version possible. 

Here’s how you can update your system: 

  1. Press the Windows + I keys on your keyboard to open Windows Settings
  2. Now, go to Update & Security
  3. Click on Windows Update and wait for your system to check for updates. 
  4. Finally, choose Download and Install if there’s an available update. 
Windows Update

Restart your computer to apply the changes and see if you’ll still encounter the error code 400 on Roblox. 

7. Clear Your Browsing Data. 

If you play Roblox directly from your browser, try clearing your browsing data to eliminate corrupted caches and cookies. 

See the steps below to clear your browsing data: 

  1. First, launch your browser and go to Settings
  2. Next, look for Privacy and Security
  3. Click on Clear Browsing Data
  4. On the pop-up window, click on Time Range and select All Time
  5. Include caches and cookies in the process and hit Clear Data
roblox error code 400 bad request

Once done, relaunch your browser and check if the problem is solved. 

8. Disable Browser Extensions. 

You can also try turning off your browser extensions if you continue to encounter the error code 400 bad request on Roblox. Some of your extensions could be conflicting with Roblox, causing it to run into errors. 

Follow the steps below to disable your extensions: 

  1. Access the Settings on your browser. 
  2. Now, click on the Extensions tab on the side menu. 
  3. Finally, disable all your extensions and restart your browser. 
roblox error code 400 bad request

Go back to Roblox afterward and check if the problem is solved. 

Related: How to Fix Error Code 403 on Roblox

9. Change DNS Address. 

Your service provider could be running into issues at the moment, explaining why you encounter the error code 400 on Roblox. If this is the case, try changing your DNS address and see if it will work. 

Here’s how you can change your DNS: 

  1. First, right-click on the Network icon in the lower right corner of your screen. 
  2. Click on Open Network & Internet Settings
  3. Now, click on Change Adapter Options
  4. Right-click on your controller and choose Properties
  5. Double-click Internet Protocol Version 4
  6. Enable the ‘Use the following DNS Server Addresses’ option and input the following values: 
  • Preferred DNS Server:
  • Alternate DNS Server:
  1. Click OK to save the changes. 
DNS Server

Try playing Roblox afterward to check if the problem is solved. 

10. Contact Roblox. 

If none of the solutions above worked, the last thing you should do is report the problem to Roblox. 

Head to their support page and submit a ticket to ask for assistance regarding the issue you’re experiencing. When asking for help, make sure to provide all the necessary details that can help their team assess the situation faster. 

roblox error code 400 bad request

That ends our guide for fixing the Roblox error code 400 bad request issue. If you have questions, please drop a comment below, and we’ll do our best to respond. 

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)

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