Found this in your log => Jan 06, 2023 16:42:41.216 [6404] ERROR - [MPVEngine/mpv] ffmpeg: tls: mbedtls_ssl_handshake returned -0x2700
And also did not find the line that should prevent this error.
You are missing the mpv.conf file with tls-ca-file=C:\Program Files\Plex\Plex HTPC\resources\cacert.pem added.