Insertion Rule on a view
That's a typical case of case misuse.

When creating the view, notice that "objectifsBoutique" is written with a uppercase B plus double quotes. This implies that any future reference to this object must include the uppercase B. 

Yet in the error message « objectifsboutique » relation is not found it's a lowercase b so that name does not refer to the view, it refers to nothing, hence the error.

The solution is to either not use double quotes at all, or use them consistently.