Multisite Plugin Page Gets 502 Bad Gateway, Need help!

For the last couple of days I have not been able to access my Plugin page in my Network Admin Dashboard. After I click it, it takes about 2 minutes and then I get the "502 Bad Gateway" error page.

I contacted my hosting/server provider and they said it has nothing to do with their end so thats why I am asking here.

Absolutely no other pages on the Network or the sub-sites on the multisite are having this issue.
Not sure if WordPress was recently updated, but would that cause this kind of issue?