I am having the same issue with Hyperbian 2.0.12, RPI-4 and WS2812b, the LEDs do not light up. I tried the same hardware setup with Hyperbian 2.0 Alpha 8 with no issues, confirming there is some setting in new version or the service is not starting. I also changed the service login to login as root, (sudo updateHyperionUser -u root) rebooted still no luck.