There was a problem saving these settings
I just installed PMS on a fresh Ubuntu server (18.04) and I get to the first server setup screen, where you choose a friendly name, and when I click the continue button, I get "There was a problem saving these settings" message after about 20 seconds or so. I know the server is able to write to Preferences.xml as the date shows it is modified.
After this, if I go back to start over (go to <IP.adde.of.my.server>:32400/Web, I get to the configure server screen saying that II have to claim my server. I click on the claim server button, and the spinner goes for a while then stops. Nothing else happens. This is where i'm stuck.