Portfolio error on link menu page

Hi everyone,
I try to setup my website with shapely,
Everything work perfectly and i love this theme,
but i having some issue with the portfolio section,
on frontpage, everything works fine, but when i create a link menu with “all the project” it seems it doesn’t work, and i have absolutly no idea on how i can resolve it…

Here is the page : Portfolio

If someone can help me with that, it will be very nice !
Thank you in advance !