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How to Fix “A JavaScript error occurred in the main process” on Discord

Are you getting the “A JavaScript error occurred in the main process” error when you you’re trying to install Discord?

Here’s the full error, “A JavaScript error occurred in the main process. Uncaught exception: Error: Object has been destroyed at Function<anonymous>”.

The error message may be different for you, but the steps to fix the error are the same.

JavaScript and installation errors are common for Windows 10, and many users have encountered them before.

Fortunately, with communication apps like Discord and Skype, installation errors can be easily fixed.

In this guide, you’ll learn why you’re getting a JavaScript error when installing Discord and how to fix it.

Why am I getting a JavaScript error on Discord?

A JavaScript error occured in the main process

You’re getting a JavaScript error on Discord because its files are corrupted.

The JavaScript error is common for Windows 10/11.

If you’re trying to install another communication app like Skype, you might encounter the error message as well.

If you encounter the error, you need to uninstall and reinstall Discord.

But before that, you need to delete all of its existing folders because they are probably corrupted.

How to fix “A JavaScript error occurred in the main process” on Discord

To fix “A JavaScript error occurred in the main process” on Discord, you need to end it in the Task Manager, delete its folders from %appdata% and %localappdata%, and reinstall Discord.

To install Discord without any errors, you need to end its task and delete its existing folders.

The first step is to end the task for Discord on the Task Manager.

This is because the Discord process is still running in the background on your computer.

Deleting its folders is essential as they might be corrupted.

After you’ve ended the task for Discord in the Task Manager and deleted all of its existing folders, you can install Discord again.

Here’s how to fix “A JavaScript error occurred in the main process” on Discord:

1. End Discord in the Task Manager

Fix "A JavaScript error occurred in the main process" on Discord

Firstly, you need to end the task for Discord in the Task Manager.

This is to ensure that Discord is not running in the background of your computer.

There are multiple ways to open the Task Manager on your computer.

The easiest way is to press “Ctrl + Alt + Delete” on your keyboard.

Alternatively, you can look for the Task Manager in the Windows Search bar and open it.

After you’ve opened the Task Manager, find the Discord app and end the task for it.

To do so, right-click on “Discord” and select “End Task” to end its task.

After you’ve ended its task, the Discord process will not run in the background anymore.

Now, you’re left with deleting the existing Discord folders on your computer.

2. Go to %appdata% and delete Discord

Delete Discord from appdata to fix "A JavaScript error occurred in the main process"

Secondly, go to %appdata% and delete the “discord” folder there.

As the “A JavaScript error occurred in the main process” is caused by corruption, you need to delete Discord’s existing folders to successfully install in on your computer.

To go to the appdata folder, type “run” in the Windows search bar.

Next, search for %appdata% in the Windows search bar and press enter to open the roaming folder.

Find the folder named “discord”, which will most likely be in small caps.

Right-click the folder and delete it.

You’ve successfully deleted the first existing folder for Discord on roaming.

Now, you need to delete the Discord folder from the localappdata folder.

3. Delete Discord from %localappdata%

Delete Discord from localappdata to fix "A JavaScript error occurred in the main process"

Thirdly, you need to delete the existing Discord folder on localappdata.

This is the last folder that you need to delete in order to successfully install Discord on your computer.

To do so, search for %localappdata% using the Windows search bar.

The local folder will be opened which contains several folders of applications that you’ve installed in the past.

The folder that you need to delete is the “Discord” folder (with capitalized “D”).

Right-click the “Discord” folder and delete it.

You’ve successfully ended the task for Discord and deleted all of its existing folders.

Now, all you need to do is to reinstall Discord on your computer.

4. Re-install Discord

Discord login

Lastly, you need to reinstall Discord on your computer again.

Go to Discord.com and click on the “Download for Windows” button.

Follow the on-screen instructions and wait for Discord to install.

After it’s done installing, a login screen will be opened.

This time, you won’t encounter the “A JavaScript error occurred in the main process” while installing the application.

Log in to your Discord account and start using the app on your computer.

You’ve successfully fixed the JavaScript error on Discord!

Conclusion

JavaScript errors can be annoying when you’re trying to install an application on your computer.

Discord and Skype are the two known communication applications that have installation issues.

Fortunately, the issue can be easily fixed using the 4-step process in this guide.

If you’re encountering installation issues for other applications in the future, you can use the same process to fix the error.

This is because installation errors like the “A JavaScript error occurred in the main process” error is probably caused by corrupted folders/files.

After you’ve ended the task for the app in the Task Manager and deleted all of its existing folders, you should be able to install the application on your computer without encountering any errors.

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About the author

Lim How Wei

Lim How Wei is the founder of followchain.org, with 8+ years of experience in Social Media Marketing and 4+ years of experience as an active investor in stocks and cryptocurrencies. He has researched, tested, and written hundreds of articles ranging from social media platforms to messaging apps.

Lim has been quoted and referenced by major publications and media companies like WikiHow, Fast Company, HuffPost, Vice, New York Post, The Conversation, and many others. One of his articles about the gig economy was quoted by Joe Rogan who hosts The Joe Rogan Experience (arguably the most popular podcast in the world), in the This Past Weekend podcast by Theo Von.

In his free time, Lim plays multiple games like Tower of Fantasy, League of Legends, Counter-Strike, Hearthstone, RuneScape, and many others. He creates guides, walkthroughs, solutions, and more on games that he plays to help other players with their progression.