My Shop page does show products (though inventory is fine) and was working

I was building site. then all of a sudden the inventory that was there (176 products) disappeared. 

This morning they are back, but the "/Shop page is just blank. 

Blank Shop page even though inventory is all there as well as categories.

It was working fine for 3 months during design.  Everything is "public". inventory is at least 1.   it should be displaying.