When I try to go to the dashboard of a site on my multisite network, I get a 504 error. I can access the main site and network dashboards just fine, but not the site in question. I recently updated some plugins and a theme- I was able to access the site prior to updating. I updated the theme via ftp and network activated it, but it does not appear in theme area in the "edit sites" area, wondering if this has something to do with it... Thanks for your assistance.