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.

If you think a recent Windows update or software installation caused the 'Critical Process Died' error, reverting to a recent restore point might fix it. Reset or reinstall Windows.