3D Platform Tutorial Start Missing Mesh in the Scene

When I am doing the 3D Platform Tutorial (New Unity) and open it up. In the Scene The Level Geometry is invisible (but listed in Hierarchy) and in the inspector for the Mesh it says Missing (Mesh). However, When I drag over Level Geometry (from Project) in scene its there but very tiny without textures. Is there step I missing or is possible to reload Mesh. Thanks:)

You could try reloading all the files of the project maybe one of them was deleted by a mistake. that happens to me when I delete a mesh for example but don't delet the object that countained it on the hierarchy, it displays the name but its empty.