Discord error, A fatal JavaScript error occurred [Fix]

Here is a complete guide to fixing the A fatal Javascript error occurred error on Discord on your PC. Discord is one of the most popular VoIP and instant messaging apps used by millions of gamers to communicate. It is very useful. However, like any other app and platform, it has its own share of errors and bugs. One of these errors includes the “A fatal Javascript error occurred” error.

The error is reported to occur when trying to launch the Discord app. Many users have also faced this error while trying to install the Discord app on their systems or when trying to update the app. This error could be a result of multiple underlying scenarios. In any case, if you are one of the affected users encountering the same error, you’ve come to the right place. In this article, we are going to discuss several fixes that helped users to resolve the “A fatal Javascript error occurred” error on Discord. You can also try these fixes to get rid of the error.

What causes A fatal JavaScript error in Discord?

There can be multiple reasons for the “A fatal Javascript error occurred” error on Discord. Here are some of the potential causes:

If you lack the administrator right to run the Discord app, you might encounter the error at hand. In case the scenario suits you, try fixing the error by running the Discord app with administrator rights.
The corrupted Discord AppData can be another reason that might trigger the error at hand. Hence if the scenario is applicable, you should be able to fix the error by deleting the Discord AppData folder.
If your overprotective antivirus suite is blocking some Discord-related files, this error might occur. So, you can try disabling your antivirus or whitelisting the Discord files through your antivirus to fix the error.
You might experience the error at hand if you are dealing with a corrupted installation of the Discord application itself. Hence, you can try uninstalling and then reinstalling Discord to fix the error.

Now that we know the scenarios that might cause the “A fatal Javascript error occurred” error on Discord, let us get straight to the solutions.

Discord error, A fatal JavaScript error occurred

Here are the solutions that you can use to fix the “A fatal Javascript error occurred” error on Discord:

Run Discord as an Administrator.
Clear the Discord AppData folder.
Whitelist Discord in your antivirus.
Uninstall, then reinstall Discord.

Let u discuss the above fixes in detail now.

1] Run Discord as an Administrator

The first thing you should try to fix the error at hand is to run the Discord installer or app with administrator privileges. This error might be triggered if you don’t have the required rights to run the software. Hence, if the scenario is applicable, you should be able to fix the error by running Discord as an administrator.

If you are experiencing this error while trying to install Discord, you can try running the installer with administrator privileges. To do that, right-click the Discord installer and select Run as an administrator. After that, press Yes on the UAC prompt and go ahead with the installation. See if the error is stopped now.

In case you are trying to run the application, go to its application file in File Explorer. After that, right-click on the program file of Discord and then select the Properties option. Next, go to the Compatibility tab in the Properties window and enable the checkbox named Run this program as an administrator. Now, press the Apply > OK button to save changes. Try opening the Discord app and see if the error is fixed.

If this method doesn’t work for you, try the next potential fix to resolve the error.

Read: Can’t install Discord, Installation has failed

2] Clear the Discord AppData folder

You might get the error at hand if the Discord cache is corrupted. If that applies, you can try clearing the Discord AppData folder. This folder will be regenerated automatically when you next start the Discord app. This fix has proven to be effective for several affected users. So, you can also try the same and see if it works for you.

Here is how you can Clear the Discord AppData folder:

Firstly, open Task Manager and make sure no process related to Discord is running in the background.
Then, evoke the Run dialog box by pressing the Win+R hotkey.
Now, type %appdata% in the Open field and press the Enter button to open the AppData folder in your File Explorer.
Next, look for the Discord folder and right-click on it.
After that, press the Delete option to clear the folder.
Finally, try relaunching the Discord app and see if the error is fixed or not.

If the error still persists, you can try the next potential solution to get rid of the “A fatal Javascript error occurred” error on Discord.

See: Discord won’t open or Stuck on Connecting screen

You might not be able to run the Discord app and might be getting this error if your antivirus has blocked some Discord files. This is most likely to happen with a third-party antivirus suite like Avast. Many times, your overprotective antivirus suite identifies some files as a potential threat due to false positives.

So, if this applies, try disabling your antivirus and see if the error is fixed. If yes, you can be sure that your antivirus was the main culprit. Hence, you can try whitelisting Discord files in your antivirus to permanently fix the error.

For example, if you are using Avast antivirus, you open up its interface. After that, select the Scan >> Scan for Viruses >> Quarantine (Virus Chest) option. Now, check if there are some Discord files in the Quarantine. You can then remove the Discord-related files from Quarantine and add these files and the Discord installer to the whitelist using the Add to Exclusions option.

Similarly, you can whitelist Discord in other antiviruses as well. If this fix doesn’t help, try the next potential solution to resolve the error.

Read: Failed to connect your YouTube account to Discord

4] Uninstall, then reinstall Discord

The last resort to fix this error is to reinstall the Discord application. You are likely to experience this error if the installation of Discord is not proper and the installation has gone corrupted. Hence, if the scenario applies to you, try starting afresh by reinstalling the Discord app and see if the error is resolved.

To reinstall Discord, you first need to uninstall Discord from your PC completely. For that, you can follow the below steps:

Firstly, open the Settings app by pressing the Win+I hotkey.
Now, move to the Apps tab and select the Apps & features option.
Next, find the Discord app and tap on the three-dot menu button present next to it.
After that, tap Uninstall and follow the prompts to complete the uninstallation.
Once done, go to Discord’s installation folder on your PC and delete the folder.
Then, reboot your PC and on the next startup, download the most recent version of Discord from its official website. Run the installer and complete the installation process.

Hopefully, you won’t get the “A fatal Javascript error occurred” error on Discord now.

See: Fix Discord Notification Sound not working

How do I get rid of Discord error?

Depending upon the Discord error code and message, you can try a suitable fix. For example, if you are getting error 1105 on Discord, you can try checking for server status, using a VPN service, switching to a different network connection, or clearing the corrupted app data for Discord. Here are some more guides that will help you fix Discord errors:

How do I fix Fatal JavaScript error occurred in Discord?

To fix the fatal JavaScript error in Discord, you can try launching the app with administrator privileges. Besides that, you can also try clearing the cache associated with the Discord app, disabling your antivirus, or whitelisting Discord in your antivirus. If none of these work, you can try reinstalling the application to resolve the error.

Why does Discord installation fail?

If Discord installation fails on your PC, it could be due to corrupted Discord app data. Another reason for the same issue can be the fact that your overprotective antivirus suite is interfering with the installation process. It could also be caused by the outdated Microsoft .NET Framework. If you want to fix the problem, you can try clearing Discord Local AppData, installing the latest version of .NET Framework, disabling your antivirus, or performing a clean boot. If these methods don’t work, try installing the Discord app in Safe Mode.