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DC Universe Online error 0x0121

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Last updated on July 9, 2022
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Are you having trouble playing DC Universe Online? Several users have reported the error '0x0121' that prevents them from playing DC Universe Online.

DC Universe Online is an MMORPG developed by the Daybreak Game Company. They released it on Steam for PlayStation 4, Xbox One, PlayStation 5, iOS, Xbox Series X and Series S, Microsoft Windows, and Android.

It is available in several languages, such as English, Korean, Chinese, and Japanese.

DC Universe Online is known for its graphics. Fans also know it for being an online game that is filled with different gameplays. It features character customization options, PvP elements, and even player housing.

You can play the game on your computer or mobile devices, such as smartphones and tablets.

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On this page, you will find more information about the most common causes and most relevant solutions for the DC Universe Online error '0x0121'. Do you need help straight away? Visit our support page.

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Error information
  • Category
    Games
  • Error code
    0x0121
  • Similar errors
    -
  • Product
    DC Universe Online
  • Developer
    Daybreak Game Company
  • Operating system
    -
  • Platform
    -
  • First seen
    May 27, 2021
  • Verified
    -
JustAnswer
JustAnswer
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How to solve DC Universe Online error 0x0121

We've created a list of solutions which you can follow if you want to solve this DC Universe Online problem yourself. Do you need more help? Visit our support page if you need professional support with DC Universe Online right away.

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Verified solution

Many errors can occur when you try to play DC Universe Online. One of the most common errors is 0x0121. This error occurs when you try to log into the game or when you try to access your account information.

This error can be annoying and frustrating because you cannot access the game properly.

A server error, a network error, or an issue with your computer or your internet connection can cause the problem.

You might also encounter this error if other applications are interfering with the proper functioning of DC Universe Online on your computer or malware on your computer. To fix this error, you need to try a few solutions.

Option 1: Update your graphics card drivers.

Your graphics card drivers might be out of date. You can update your graphics card drivers by downloading the latest version from the website of your graphics card manufacturer.

You can also try updating your drivers through the device manager or by searching for and installing them manually.

Option 2: Disable the Nvidia In-game overlay.

The Nvidia In-game overlay can cause DC Universe Online to crash when you try to play it. To disable this overlay, you need to go to the NVIDIA Control Panel and disable it by following these steps:

Go to Start > Control Panel > System and Security > System > Advanced system settings > Performance Information and Tools (Performance tab) > Adjust Visual Effects Settings > Uncheck Display an In-Game Overlay (Show Boxes).

Option 3: Update to the latest software version.

To fix this error, you need to update your software or update your computer’s drivers.

Option 4: Check if there are any issues with other applications on your computer that might interfere with DC Universe Online loading properly.

If there are any other applications on your computer that might interfere with DC Universe Online loading properly, try uninstalling them or try to disable them. You can also try updating your applications or installing the latest version.

If you cannot uninstall or disable any other applications on your computer, you can try to update your operating system or reinstall your operating system.

Quick fixes

Try one of the quick fixes below to quickly resolve the DC Universe Online error 0x0121.

Restart your device

Quick action

Restart your device if you haven't already done so. A simple restart can solve a lot of problems.

  1. Turn off the device completely by pressing and holding the power button.
  2. If your device is connected with a power cable, unplug the power cable from the device for at least 1 minute once you've turned off the device.
  3. Plug the power cable back in and turn the device back on.
Read the full guide Report

Restart your modem and router

The error could be related to an underlying network connectivity issue, so it's a good idea to restart your modem and router.

  1. Unplug your modem (and your router, if it's a separate device) from power for about 30 seconds.
  2. Plug the modem back into the power outlet first and wait 1-2 minutes before turning on the router. Wait for all of the panel lights on your modem to turn green.
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Clear the app cache and app data

Clear the app's app cache and app data to remove any temporary data and files that may cause issues while using the app.

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Reinstall the app

Reinstall the app to remove all data and clear the app's settings.

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Update your graphics card drivers (PC)

If you're playing this game or app on a PC, make sure you have the latest graphics card drivers installed, otherwise your games and apps may crash. Depending on your operating system and graphics card, install the latest drivers for your video card.

Download NVIDIA driversDownload AMD drivers Read the full guide Report

Install DirectX 11 or DirectX 12 (PC)

Turn off DirectX 12 or change from DirectX 12 to DirectX 11 in the video settings of the game you're trying to play. The differences between DirectX 11 and DirectX 12 are quite significant. DirectX 11 provides a much smoother framerate for low-to-midrange PCs.

Read the full guide Report

Disable the Nvidia In-game Overlay (PC)

The Nvidia Geforce Experience overlay can cause video issues and errors while playing games or watching videos. Turn off the in-game overlay.

  1. Open GeForce Experience and login if you're not logged in yet.
  2. Click the Settings (icon) at the top right.
  3. Click the General tab, turn off IN-GAME OVERLAY, and close the program.
Read the full guide Report

Have you found a solution yourself, but it is not in the list? Share your solution in the comments below.

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