Photos freezes, cannot share

Photos does not let me share a picture by email, as soon as I try, all function are frozen and I cannot exit photos. It used to work before el capitan.

Unlike other people I do have the share button and I made sure that everything was checked in the extensions.

My only solution to send a photo by email is to add a document, but then the picture is very small so it is hard to choose quickly the proper one.

Thank you.