You need to do this for all Discord-related files you see. After restoring all quarantined Discord files, quit the antivirus and then retry installing the Discord program again.

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 ...

If you see JavaScript required to sign in error when using OneDrive, Skype, Teams or Office 365 apps, enable JavaScript in Chrome, Firefox, Edge.