WP-Login is blank

Hey all,

I’m trying to update and log into my website but the screen is showing a blank white screen. For clarity – “*mywebsite*. com/wp-login” is what I’m typing in to access my website’s wordpress login.

Big picture, I’m trying to update my website using FireZilla and Atom. Obviously, you can all tell I’m very entry level, so any help would be greatly appreciated.

Thank you.