You need to route your rtorrent through nginx proxy for this to work, because rtorrent uses fucking scgi that is not supported in a sane way anywhere.
There is a good example of nginx config here: https://github.com/jeanralphaviles/jeanralphaviles.github.io/blob/master/_posts/2019-10-12-rtorrent-xml-rpc-with-curl.md

• Configure sqlite db path in both *.py scripts.
• Modify variables on the top of torrentfeed.py to your liking.
• Add new torrents by running torrenttrack.py -u 'https://anidb.net/anime/3298'
• You can specify season to keep track of if its different than season 1, it will default to searching for the first season.
• After you have some series added, run torrentfeed.py periodically (for example with the provided systemd service and timer) to download and add new entries to rtorrent.