Arvados

504 Gateway Time-out
nginx/1.6.2

Tried 3x on https://workbench.su92l.arvadosapi.com/collections

qr1hi seems to fare a little better, makes it through after a few minutes.
https://workbench.qr1hi.arvadosapi.com/collections

Maybe list first 20 instead of first 100 results?

Note: you reach here from dashboard, https://workbench.qr1hi.arvadosapi.com/ > Recent collections > all collections ? > https://workbench.qr1hi.arvadosapi.com/collections