Broke the Pages on our site

I think the latest post plugin broke the pages on our site. It seemed that POSTS still worked fine, however on Pages it gave us a loading error. Our host was able to track the error down to this plugin and deactivating the plugin fixed the loading errors immediately. Do you know what may have caused this?

The site is https://littlehouseontheprairie.com and it appears that the POSTS classifcations were never rendering incorrectly, only our Pages. However in plugin settings when I tried to turn off related posts on Pages that did not fix the issue. I’d love any help you might be able to offer – angela (at) elementassociates.com is a good email for me.

Thank you.
Angela