Uhh then I re-installed it, I think I had to stop/start it once to get it going, then since it is a fresh install, at some point early on the web-ui for UniFi app asks if you’re making a fresh install or if you got a config you want to upload, then you upload the config, wait a bit, maybe do a stop/start if it doesn’t work in a few minutes; success.
I had the same experience. Backed up and deleted old controller (including iXVolumes). Created the new one. In the setup process, choose “Restore from backup“, which got the app stuck in “deploying“ stage. Stop/start the app and get a new controller with old controller settings/history data.