This indicates no sd card or full sd card or sd card needs formatting, if your camera has been working ok previously you may not have loop recording selected
the camera slides out of the cradle easily with out cutting it, if yours is tight just trim the little lugs at the front a small amount, and leave the whole mount attached to the Window
My mobius sometimes shuts down because of this issue so I installed a small switch on the power cable so I can easily restart both my cameras at the same time from the dashboard just by flicking the switch