Add this code to the Custom CSS field on the Style tab of your Instagram Feed widget’s settings:
.eapps-instagram-feed-posts-item-image-wrapper {
background-color: #000;
}
img.eapps-instagram-feed-posts-item-image {
top: 0 !important;
transform: translateX(-50%) !important;
height: 100% !important;
width: auto !important;
}
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