Whether the schema is https or http, the request returns a 404 when testing with curl.
I also see the same output on a perfectly functional system; so I suspect that this is harmless and is likely a case of the logging being more verbose than it strictly needs to be.
@skyesete If you’re experiencing a particular issue with Plex, it would likely be better to open a thread to discuss it, describing it in as much detail as possible. Plex logs in general have many errors logged which mean very little as far as the proper operation of the system is concerned. A great example of this is when it checks to see if a supported Intel or Nvidia GPU is present for hardware decoding. It logs an error if one or both is not found, even though none was expected to be found. So it’s best to describe behaviors, not particular errors logged. They may be relevant later in-context, but not on their own.