That is solved by booting it up outside or near a window (or having a NTP server running on your local network).
ReachView wants you to update the software on first boot, and that requires either a Wi-Fi connection with Internet access. If you must bypass those requirements, then you have to run this command over ssh:
touch /etc/reachview/first_time_setup.cfg
Be aware that this is an abnormal thing to do. It is a bypass technique, and because of that, you won’t be running up to date software.
For reference the command above was copied from this post: