I’ve been using this plugin on several pages on this site for a while. Recently I’ve seen errors on some of the pages and occasionally on other posts pointing to this plugin. I checked and it has not been updated for 7 years, so decided to pull the plug.
Rather than find a new plugin I just changed the pages to use the new Blocks editor and add feeds using some blocks.
For some I used the Display Remote Posts Block – WordPress plugin. This I discovered & installed through the add block interface & found later that it has installed a plugin. On others I used the built in RSS & podcast player blocks. All three seem to do the job.
Examples: RSS block, Podcast Block & Display Remote Posts.
I am not ready for the Block editor full time on this blog. I’ve been exploring it a little on Glow Blogs. But I’ve got a few things here that are incompatible (eg. Post Kinds plugin) and for my blog the classic editor, is usually more than enough.