Hi @mr2p Thanks again for your reply. I followed your instructions and, although it now displays something, what it displays on the page looks more like the unprocessed gallery (the below is for shortcode [photoblocks id=3]:
#photoblocks-3 {width: 100%;} #photoblocks-3 .pb-block {border-color: #333333;} #photoblocks-3 .pb-title {color: #ffffff;font-size: 20px;} #photoblocks-3 .pb-description {color: rgba(255, 255, 255, 0.7);font-size: 14px;} #photoblocks-3 .pb-block.pb-type-text .pb-overlay {background-color: #ffffff;} #photoblocks-3 .pb-block.pb-type-text .pb-title, #photoblocks-3 .pb-block.pb-type-text .pb-description {color: #333333;} #photoblocks-3 .pb-block.pb-type-text .pb-title {font-size: 16px;} #photoblocks-3 .pb-block.pb-type-text .pb-description {font-size: 12px;} #photoblocks-3 .pb-overlay {background: rgba(0, 0, 0, 0.15);} #photoblocks-3.pb-lift.show-empty-overlay .pb-block.pb-type-image:hover, #photoblocks-3.pb-lift .pb-block.pb-type-image.with-text:hover { box-shadow: rgba(0, 0, 0, 0.15) 0 0 20px; } #photoblocks-3 .pb-block { } #photoblocks-3 .pb-block .pb-social button {color: #ffffff;font-size: 14px;} #photoblocks-3 ul.pb-filters a.selected {border-color: #444444;} #photoblocks-3 ul.pb-filters.pb-filters-style-boxed a.selected {border-color: #444444;} .photoblocks-fancybox-3 .fancybox-bg {background-color: rgba(0, 0, 0, 0.75);} #photoblocks-3 .pb-blocks .pb-type-image {max-width: calc( 100% – 0px )}