This has been asked before but it has either not been addressed or the answer is to ignore the errors. The problem is I have tons of them. They look like this:
Jan 18, 2023 13:11:15.012 [0x80a787500] DEBUG - NetworkServiceBrowser: Parsing SSDP schema for http://192.168.5.20:9080
Jan 18, 2023 13:11:15.012 [0x80a787500] DEBUG - [HCl#9ec] HTTP requesting GET http://192.168.5.20:9080
Jan 18, 2023 13:11:15.060 [0x808e6c500] DEBUG - [HttpClient/HCl#9ec] HTTP/1.1 (0.0s) 200 response from GET http://192.168.5.20:9080 (reused)
Jan 18, 2023 13:11:15.060 [0x80a787500] ERROR - XML: Entity: line 1:^@
Jan 18, 2023 13:11:15.060 [0x80a787500] ERROR - XML: parser^@
Jan 18, 2023 13:11:15.060 [0x80a787500] ERROR - XML: error :^@
Jan 18, 2023 13:11:15.060 [0x80a787500] ERROR - XML: Start tag expected, '<' not found^@
Jan 18, 2023 13:11:15.060 [0x80a787500] ERROR - XML: status=ok^@
Jan 18, 2023 13:11:15.060 [0x80a787500] ERROR - XML: ^^@
Jan 18, 2023 13:11:15.060 [0x80a787500] ERROR - Error parsing content.
Jan 18, 2023 13:11:15.060 [0x80a787500] ERROR - Error parsing XML: Error parsing file.
Jan 18, 2023 13:11:15.060 [0x80a787500] ERROR - SSDP: Error parsing device schema for http://192.168.5.20:9080
In my case this happens a lot because we have several Amazon Fire TV and Amazon Echo devices.
Just ignoring them is a poor answer because they are a lot and they make reading the logs difficult. Plex should implement a way to disable them. The worse is that they are displayed with the keyword ERROR so it makes annoying to search for actual errors.