PowerReviews app no longer works

[Will131]

First let me start off by stating I'm not too tech savvy when it comes to the backend coding within Shopify, that allows apps to play nicely with Shopify.  We've been using PowerReviews as the app to display and manage reviews within our site.  Recently, it looks like there's a disconnect with the app.  Historical product reviews or even the ability to leave a new review is missing.  My only guess is that something has changed within Shopify but I'm kind of stumped as to what may have changed suddenly.  I had a conversation with PowerReviews and they seem to think there's some "<span class=" code that is throwing off PowerReviews on the product pages.  Yeah, I know it may be a longshot, but does anyone have a similar issue or any guidance they can offer on troubleshooting this?