I’m having this issue after completing all the steps with a character (AccRIG, bone creation, rigging). I’ve tried everything: importing the character as FBX, OBJ, using different scales, importing as a Prop or Character. Exporting from ZBrush with GOZ, from Blender, with various scale settings. As a single object or separated (body and head). I’ve tested with other models and the same thing happens.
As you can see in Skin Weights, the character appears completely black, and a smaller wireframe version of the same character is also visible. This happens in version 4.54 and earlier.
And yes, in Condition I have enabled 'Wireframe on Shaded 
EDIT: Solved. I had DSLL applied. If I deactivate it, the model with wireframe appears again. You can close the post. Thanks