If you receive A JavaScript error occurred in the main process, Uncaught Exception message when you try to open apps like Skype, Discord, etc, in Windows 11/10, then ...

Troubleshooting Discord fatal javascript error in Windows 10 Performing the following procedures will help eliminate every possible trigger and eventually fix the fatal javascript error in Discord.

Deleting the Discord data folders is the most common fix for Discord JavaScript errors when trying to start up the application.