We recently made changes to Anthias. It’s now available again on the Raspberry Pi imager.
Be it Anthias is install via the Raspberry Pi Imager, via the release images, or via the installer script, are you still experiencing installation and/or startup issues?
Sorry for the rough ride. Upgrading an old Screenly OSE install in place to Anthias from that period was fragile, which is what broke things for you. The clean way now is a fresh install: Anthias is available directly in the Raspberry Pi Imager, so you choose Anthias from the operating system list and write it to a card, with no upgrade dance needed. Marking this as solved. If a fresh install still gets stuck, please open a new topic with what you see on screen and we will help.