How to Fix / Solve Hearthstone DB Error 303

How To Fix Hearthstone DB Error 303: A Comprehensive Guide

How To Fix Hearthstone DB Error 303: A Comprehensive Guide

News: Are you experiencing difficulties in launching Hearthstone on your device? Are you facing challenges logging into your account and consistently coming across the error message, “Closed. Oops! Playful sprites have disrupted Hearthstone as it was connecting to our servers. Please wait a few minutes for them to disperse and try again. Hs: NGRESULT DB ERROR:303:0” when attempting to do so?

Handling this error can be genuinely frustrating, given that it impedes your ability to log in to Hearthstone and enjoy your gaming account. Nevertheless, there’s no need to be anxious any longer, as we are here to provide you with assistance.

Hearthstone has swiftly risen in prominence as one of the leading online card games, owing to its captivating gameplay and an enticing cast of characters. This article is dedicated to addressing the DB error 303 in Hearthstone, a problem that hinders players from logging in, and offers a range of solutions to rectify the issue.

What is the Cause of Hearthstone DB Error 303?

Multiple factors could contribute to the occurrence of DB error 303 in Hearthstone during login attempts. These issues might span from server-related problems with Hearthstone to interference by your antivirus software affecting the game’s functionality on your device.

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The Hearthstone team has acknowledged that the DB error 303 is a bug that they are working to fix. However, there are other potential causes for this issue. Below, we have listed a few reasons for your convenience.

  • Technical issues within Hearthstone.
  • Server outages or high traffic.
  • Antivirus software causing conflicts with Hearthstone.
  • Firewall blocking Hearthstone’s connection to its servers.
  • Interference from other open programs.
  • Device bugs preventing Hearthstone from logging in to your account.

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How to Fix Hearthstone DB Error 303?

To address the DB error 303 problem in Hearthstone, you can attempt the following remedies: turn off your firewall, reboot your device, verify the server status of Hearthstone, deactivate your antivirus, validate game files, and perform a reinstallation of Hearthstone.

1. Try Again Later

As indicated by the error message, one course of action when encountering error 303 in Hearthstone is to attempt opening the game at a later time. If the issue is related to technical problems with Hearthstone, it’s possible that the developers are actively working to resolve them. Waiting for a period and then trying to open the game again can often yield positive results.

However, if the issue continues, it might be due to a server outage or unusually high traffic. In such instances, it’s recommended to check the server status of Hearthstone in the interim to gain a better understanding of the situation and when you can expect to resume your gameplay.

2. Disable Firewall on Windows

If your firewall perceives Hearthstone as malicious software, it may intermittently block its requests, resulting in the DB error 303. To resolve this, simply disable your system’s firewall by following these steps:

  1. Go to the Control Panel from the Windows search bar.
  2. Open Systems and Security.
  3. Select Windows Defender Firewall.
  4. Enable the Windows Defender Firewall.
  5. Click on the “Turn off Windows Defender Firewall (not recommended)” button under the Private network settings and Public network settings.
  6. Click OK and close the window.

3. Close All Programs

If you’re running other programs in the background while trying to launch Hearthstone, it’s advisable to close them before attempting to log in. On a Windows computer, you can access the Task Manager by using the Windows search option and close any unnecessary programs from there. On a mobile device, ensure that you’ve closed all other open apps before logging in to Hearthstone. This can help prevent potential conflicts and improve the game’s performance.

4. Restart Your Device

A straightforward solution for the DB error 303 in Hearthstone is to restart your device. Numerous players have noted that a simple device restart can effectively resolve the issue, particularly if it’s linked to a device-related bug. So, if you encounter this error, try restarting your device as an initial troubleshooting step.

5. Verify Game Files of Hearthstone

When playing Hearthstone through the desktop app, you can use the built-in game verifier to scan and repair any corrupted or missing game files. Follow these steps:

  1. Open and navigate to the Hearthstone page.
  2. Click on the options menu and select “Scan and Repair.”
  3. Wait for to finish verifying the files.
  4. Try opening the game and logging in again.

6. Disable Antivirus

If your antivirus software is causing issues and preventing Hearthstone from running on your device, you may need to temporarily disable it before launching the game. Keep in mind that each antivirus program has its own unique process for disabling it, so it’s crucial to consult your antivirus software’s documentation or website for the specific steps on how to disable it temporarily. This should help you bypass any potential conflicts and enjoy uninterrupted gameplay.

7. Uninstall and Reinstall Hearthstone

As an alternative solution, you can uninstall Hearthstone and then reinstall it. Follow these steps:

  1. Go to the Control Panel, select Programs, and click on “Uninstall a Program.”
  2. Find Hearthstone, right-click, and uninstall it.
  3. Visit the Official Website to download Hearthstone again.
  4. To uninstall Hearthstone from your phone, locate the app, long-press it, and select the Uninstall option from the menu. Then, go to your device’s App Store and reinstall Hearthstone.

8. Contact Blizzard Support Team

If you’ve diligently applied all the suggested solutions and the error continues to persist, we strongly recommend getting in touch with the Blizzard Support Team. They are well-equipped to offer additional assistance and work with you to resolve the issue effectively. Don’t hesitate to reach out for their support to ensure a smoother gaming experience.

Facing the DB Error 303 in Hearthstone can indeed be exasperating, but the solutions outlined in this article are here to help you overcome this issue and get back to enjoying the game. It’s important to methodically attempt each fix, one at a time, and if the error lingers, don’t hesitate to contact the Blizzard Support Team for further assistance. Here’s to a happy and uninterrupted gaming experience!


1. Can’t I just keep trying to log in without applying any fixes?

No, repeatedly attempting to log in without addressing the DB error 303 issue may not resolve the problem. It’s best to follow the suggested fixes to ensure a successful login.

2. What if I don’t have antivirus software?

If you don’t have antivirus software installed on your device, you can skip the step of disabling it and proceed with the other solutions.

3. Is there any other way to contact Blizzard Support Team besides reaching out to them directly?

Yes, besides directly contacting the Blizzard Support Team, you can also visit their official website and explore their support forums for any existing solutions related to the DB error 303 in Hearthstone.

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