WSOD Help

Hello!

I have the dreaded white screen of death. I have attempted to go through all the steps outlined in:
https://codex.wordpress.org/Common_WordPress_Errors#The_White_Screen_of_Death

However, when I use FileZilla, I get the following errors when trying to access my site:
Response: 530 Login authentication failed
Error: Critical error: Could not connect to server

The problem is that I am 100% positive I have entered the right name and password. I previously got hacked and installed a bunch of authentication plugins and I’m wondering if this is what is preventing me from logging in? Is there any other way to login?

Thanks!

The page I need help with: [log in to see the link]