I can't extrude in blender 2.8. So I merged a cube at its center. I went to vertice mode and edit mode too. I tried to extrude the vertex but when I do it just duplicates it. I thought the problem was because it was a merged shape. So, I make another cube without merging it and extruded it. Guess what happened. It duplicated again! What do I do to extrude in blender 2.8? I press E and it doesn't work. Did they change the shortcut or what?