Pretty much at the moment proven by other users on the forums, to be an error on Bungie's end. There is no way us players can fix this, but we can bring notice to the subject by liking/upvoting any Cabbage/Lettuce error code posts. (or any other Error code you get frequently) For me, I get lettuce in the social areas, and Cabbage when spawning into worlds, or matches of any type.