Salient 8.5.4 is Now Compatible with Woocommerce 3.3.1 . Kindly update the Theme if you have updated Woocommerce . 

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Missing "Read More" button in Ascend Skin”

The ascend skin actually hides that on purpose for a different look - if you want it back in add this into the custom css box located in your Salient Options panel:

html .ascend #search-results .result span.bottom-line, html .ascend .masonry-blog-item span.bottom-line, html .ascend .masonry-blog-item .more-link {
    display: block!important;
}