I think I have it as roomscale even though my room is a long rectangle. Do I need to use sitting/standing mode?
It should be room-scale. Such message appears when it can't read info about play area. With SteamVR it happens when the headset was not detected in the area. For Oculus it should be only when in standing/sitting mode.
Could you send me a log file (from _logs subfolder a file named output<date-time>log)?