hello
I don’t know what I touched… 
but if I tell you that in the ‘viewport’ in rendered mode I don’t see my objects, but everything comes back to normal in ‘eeve’ or shading mode.
Thank’s
Check your outliner icons:
Both the Eye and the Camera should be on- if they’re off, they’ll be crossed out and grayed out
I found; ‘open shading’ => he doesn’t like it 
