Transcoder doesn't work & not able to access 127.0.0.1 or Localhost:32400

Server Version#: 1.41.2.9200-c6bbc1b53
Player Version#: v.1.104.0.241-2164c90a
Server run on Mac Mini, OS X 15.1 (24B83)
<If providing server logs please do NOT turn on verbose logging, only debug logging should be enabled>

When I attempt transcoding, the following error appears on plex player.

Playback Error
An unknown error occurred (4294967279)
Error code: 4294967279

I have had this issue for about a month, and update the server to a newer version as well as re-installing the server. I have checked some other threads for solution without success. (the error message changed from “conversion failed” to “unkonwn error” after server re-installation)

Another odd thing is I cannot access 127.0.0.1 from my server machine (mac mini). When i attempt to access localhost:32400, I am shown
"Warning: Potential Security Risk Ahead. - Websites prove their identity via certificates. Firefox does not trust this site because it uses a certificate that is not valid for localhost:32400. The certificate is only valid for *.7fa066660d1642eebe732ba42098868a.plex.direct. Error code: SSL_ERROR_BAD_CERT_DOMAIN
"

and only after I click “Accept Risk and continue” I can access plex server from my browser (for example, in order to download logs).

Here is my log file.
Thank you for your help.

Plex Media Server Logs_2024-11-17_21-27-10.zip (3.7 MB)I

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