The most common cause is a problem with security certificates in your network—this often happens because of filters, proxies, or restrictions set by your internet provider. Now that you know the causes, let’s discuss the solutions.
1. Restart Your Computer and Router
The first step in fixing most technical problems is to restart both your computer and your router. This simple action can resolve many temporary issues that may interfere with Roblox. Start by restarting your computer. After that, reboot your router to clear any network problems that could be causing the authentication error. Once you’ve restarted both, check if Roblox works. If not, try the next steps.
2. Check the Roblox Server Status
Before trying more advanced steps, it’s a good idea to make sure the problem isn’t with Roblox’s servers. Server issues can often cause authentication errors. Visit status.roblox.com to quickly check if there are any ongoing problems on Roblox’s end.
3. Delete the Roblox Folder from AppData
Almost all programs use the AppData folder to save files and information they access frequently. Roblox also keeps login cookies here to recognize users. If these authentication cookies become corrupted, you might see the authentication failed error (error code 0). To fix this, try deleting the Roblox folder. Don’t worry – Roblox will automatically create a new folder once it launches again.
4. Clear Your Roblox Browser Cache
If you play Roblox using your web browser, clearing your cache can help fix issues caused by stored cookies and temporary files. Doing this removes old data and forces Roblox to create new authentication cookies, which may solve the error.
5. Reinstall Roblox
If things still aren’t working, it might be due to damaged Roblox files. Reinstalling Roblox will give you a fresh start and can often fix these issues.
