Diablo IV Lilith with wings
Image via Blizzard Entertainment

How to fix Diablo 4 error code 1

Hopefully, this is the last you'll see of error code 1.

Nobody wants an error code stopping them from playing Diablo 4. While “Error Code 1” sounds like the code to end all codes, it is fixable. Follow the steps below, and you’ll be as right as rain. These errors usually have a simple fix, and it takes five to ten minutes of your time. 

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The error code one might appear for a couple of different reasons. It can simply be a problem with your PC and connection, or it could be a growing issue on Blizzard’s side. Either way, this is everything you can do to fix this Diablo 4 error.

How to fix Diablo 4’s Error Code 1

A close up of Diablo 4 antagonist Lilith
Lilith hates error codes. Image via Blizzard Entertainment

Error Code 1 in Diablo 4 is typically an issue on Blizzard’s end. However, there are five steps you can take to troubleshoot and fix the problem, including restarting your platform, Blizzard’s Battle.net and Diablo, checking for updates, checking your connection, turning off your antivirus, and checking Blizzard’s maintenance schedule.

 1) Check if Blizzard is doing maintenance

If you’re experiencing any error in a Blizzard title, you should always double-check whether Blizzard or Diablo 4 is down. One way to do that is to check the Diablo Twitter account for updates.

The developers always share when they’re shutting down servers for maintenance or releasing a massive update. Most of the time, these updates are planned. However, there are times they are not. So, if you do see the “Error Code 1” error, it may be because Diablo 4 and Blizzard are down. But as soon as the servers are up, you should be able to play Diablo 4 again.

2) Check for Updates on Battle.net

Sometimes, errors appear in Diablo 4 because an update is about to drop or has already dropped. Ensure your game is up to date by following these steps:

  1. Go into your Battle.net app
  2. Click on the cog next to the “Play Now” section down the bottom left of the application. 
  3. Select the “Check for Updates” option in the dropdown menu to the right.
    1. If your game is up-to-date and the error still appears when you log in to Diablo 4, you may need to use the repair tool.
  4. Click the cogwheel again, and instead of clicking “Check for Updates,” select “Scan and Repair.”
    1. This will check if your files are corrupted and fix them in the process. Sometimes, the game has difficulties installing new updates, meaning files get corrupted. This will fix the issue and hopefully get you back in.

3) Restart your PC, Battle.net, and Diablo 4

Restarting your PC and fully closing Diablo 4 and your Battle.net app is always the first step in fixing any issue. Turning it off and on again is a tried-and-tested method that will always be worth trying. Be sure to fully close Battle.net and Diablo. Otherwise, your efforts will be for naught.

It’s a simple fix that usually works with most of Diablo 4’s errors. With some luck, you’ll be back in the Sanctuary.

4) Test or restart your internet connection

The errors we see in Diablo 4 can often be caused by an unstable internet connection. To test your connection, you can run a diagnostic check or simply turn off your router and wait a few minutes before restarting.

This should give it enough time to completely refresh and allow you to return with the best connection possible. But if the issue persists, go to the next step.

5) Turn off your Antivirus

If the problem persists, turning off your antivirus will be the next step. Security settings might be preventing access to certain files Battle.net or Diablo 4 needs to get your game going. In most cases, search for your antivirus icon in the taskbar and deactivate it. You might need to check your hidden icons to see your specific antivirus program.

Tip:

However, given your antivirus software’s assumed protection, this isn’t generally the best option and should only be done as a very last resort if nothing has worked.

If you’ve tried the above steps, you have only two options left: Uninstall and reinstall Diablo 4 or contact the Blizzard customer support team directly. These are not the ideal options, but if the other fixes haven’t worked, they can, in most cases, help resolve your issue.

So, if you’re experiencing the “Error Code 1” error in Diablo 4, these are all the steps you can take to help troubleshoot and fix the issue.


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Harrison Thomas
CS:GO, Overwatch, and Valorant Staff Writer - Played CS:GO since 2012 and keep a close eye on other titles. Give me a game and I'll write about it. Ranks are private information. Contact harry@dotesports.com
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Hayley Andrews
Hayley is a gamer, writer, and author with a background in Business. Hayley graduated with a dual degree in Business Management and Human Resource Management in Australia. She spent many years in business until she found her passion for creative writing and the gaming industry. When she’s not indulging in the latest anime, she can be found reading or playing video games.