When I test the https://rss.art19.com/techmeme-ridehome feed on my site, the issue I’m seeing is that no URL is being found for the feed items. That means that it’s failing to create the topic here:
I’m unsure why the URL is not being found, or if sorting out that issue would allow the topics to be created without other issues. I’ll try to find some time to look into this some more this week. If anyone knows about how the URL for a feed item gets set, please let me know.