The piece mentions "monastère que les religieux" but later says "Benoît Autric est chargé par les sœurs" - monks or nuns?

Martin, you can read more of the history of this magnificent structure at the link below. It is a historical, ancient monastery that has been home (open) to a mixed order since 1986 - 

“ C'est en 1982 que La Verne va retrouver sa vocation initiale en accueillant des moines puis à partir de 1986, des moniales de la famille monastique de Bethléem, de l'Assomption de la Vierge et de Saint Bruno. “

 https://www.mpmtourisme.com/patrimoine-culturel/chartreuse-verne

I have to admit I did not know there was such a thing as a mixed order. It must have caused problems!