Galaxy server not loading

Hi! I’m trying to access the Huttenhower Lab’s public Galaxy server, and for some reason it won’t load (initially tried on Friday and have been unable to get it to work). I’ve tried a few combinations of browsers/networks/computers. I’ve also used the server before and haven’t come across this issue. The error I’m getting is a 504 gateway time out, if that’s helpful. Does anyone have troubleshooting tips? Thanks!