The fix is easy though ,
if your discord doesn't opens up , wait for a few minutes be patience it will load up after few minutes.
if it still doesn't load up after 10-15mins then press Windows key + R , it will open up Run.
Now type ''%localappdata'' in the Run and press enter or click okay. Find a folder named 'Discord' open it and rename the 'Update' to 'Update1'.
What this does is sometimes Discord doesn't install the updates correctly , and that's the fix for it.
Thanks!