If you've got it working then obviously it must be possible, but I'm a touch confused because the ErsatzTV documentation says "A Plex Pass is required for ErsatzTV to work with Plex." (https://ersatztv.org/docs/user-guide/configure-clients)
Is it possible that you had this working in the past but Plex has since removed the functionality from their free tier?
I've never had a Plex Pass and I currently use ErsatzTV through Plex daily. I also tried out Tunarr this afternoon and got it working. Though I'll be sticking with ErsatzTV.
Is it possible that you had this working in the past but Plex has since removed the functionality from their free tier?