This tweak will make the Filterable Portfolio images un-clickable in the grid layout.   There were some other tutorials for how to do this [here], but they didn’t work for me, so I fiddled with CSS until I found a solution that worked.

I added this CSS to my Child Theme stylesheet:

/* REMOVING LINKS IN PORTFOLIO GRID */
.et_pb_portfolio_item a {
pointer-events: none;
cursor: default;
display: inline-block;
}