To disable Instagram Feed popups, go to Layout tab in your feed’s settings, and select Post Settings section. You will need to scroll down a little to see the field Action on Image Click:
As you can see, there are three options you can choose from. Open in Popup – is the default option that opens the popup on a click on an image in the gallery. Open in Instagram – the plugin will redirect a visitor to the gallery’s source Instagram account. If you select None, nothing will happen on a click in on an image in your gallery.
Choose the option that suits you best, and enjoy your beautiful gallery and a great user experience with Elfsight Instagram Feed! 🙂