Reinstalling Discord is the most important method as this solution has worked for many people who struggled with this problem before. This solution is generic and it is important to follow each and every step correctly if you want to reset your Discord installation and make it work properly again.
Make sure you are logged in with an administrator account as you will not be able to delete programs using any other account.
a. Click on the Start menu and open Control Panel by searching for it.
b. In Control Panel click on Uninstall a Program under the Programs section.
c. If you are using the Settings app, clicking on Apps should immediately open a list of all installed programs on your PC.
d. Locate Discord in Control Panel or Settings and click on Uninstall.
e. Click Finish when the uninstalling process finishes.