in blender only saw the placeholder not mesh

[chongxian]

hello, I open the scene.blend only saw the box(placeholder) but never saw the mesh, if I click Render button can get the image. However, I want to saw the mesh in the blender viewport, how can I do to unhide them.
And I follow other issue to do,but also can't solve this problem, Thanks for your help.

[araistrick]

See the brief video tutorial in #94