Issues with Discord can occur for a variety of reasons. Maybe Discord is having a server issue, or maybe your operating system is causing problems with the app due to corrupt or damaged files. It may even be that a Discord update messed something up within the app itself.
How to fix it if discord not loading ?
With so many things that could impact your Discord experience, there isn't a universal solution to all of them. Make sure you installed the app correctly, see any guide on how to install Discord.
You can restart or reboot your device.
You can restart your discord app.
You can clear data of discord apps in settings.
Try to Log in to Discord with Web Version in any browser.
Ensure that the app is updated.