Can't set a script schedule on Claris Server

[human]

Running Claris Studio Server on Ubuntu, latest version 40.3.1.3. I can log in as a client and run server-side scripts with the "perform script on server" command, and they succeed. But when I try to make a script schedule in the admin console, it looks like its not able to log into the solution with the Claris ID, and nor can I log in or even set up "local" users.