You are most welcome!
Actually, it was not getting the overlay there.
So, I have used the following custom code in your custom CSS of the home page template style:
.sp-simpleportfolio .sp-simpleportfolio-item .sp-simpleportfolio-overlay {
display: block !important;
}
About the VIEW button:
You need to assign all of your portfolio categories to a menu item , then it will not redirect to an error page. If you dont want to show that menu you can hide it too.
OR. if you don't want to show the view button really, then you can use the following code in your custom CSS:
.sp-simpleportfolio .sp-simpleportfolio-item .sp-simpleportfolio-btns a.btn-view{
display:none;}
Best Regards