That means - the safety interlock has a bad contact. Check doors/covers where interlocks installed.
The purpose of interlock is just to avoid a laser beam exposure to person's eyes when door/cover is open and to switch OFF the laser module.
PS I'm not Ripit rep, that's just from my common sence.
Were you able to resolve your "open door" issue?
if not contact me directly... kimsaks619@aol.com
I am a certified "RipIt" tech and your error could mean more than just an interlock circuit.