Please teake a look here:
https://demo.northeme.com/centreal-plus/project/flora/

my site works different, when a I click on little thumbnails I don't see the pertinent image, for example if I click on the fifth image I don't see that but one on the left or on the right, my gallery works linearly while your sie demo works well.
I would like to be able to choose the photo that seems to me

I checked in the portfolio project but I have seen nothing to fix.

Please help me.

If is necessary I can privatly write user and password

thank you in advance

Andrea