Express has to be able to ping uploads.delphix.com
every 7 days or it goes into lockdown state meaning everything you have created still runs but you can't create anything new.
To clear this issue navigate to the top right of the Web UI:
then login as "sysadmin"
the default password is sysadmin, though you are prompted to change it at install time.
After you login, choose menu "support bundle" and click ok
That should clear the lockdown