Thanks for the reply.
I’m almost certain that the writeable folder error is a result of the the earlier error during initialisation. Here is the log for the same file, on the server’s Administrator account - same error about write permissions, yet the Administrator account has permissions for everything.
2020-09-25T17:18:10.543 [ DEBUG ] [mpv] decode_wrapper/ad: Codec list:
2020-09-25T17:18:10.543 [ DEBUG ] [mpv] decode_wrapper/ad: eac3_mf (eac3) - EAC3 via MediaFoundation
2020-09-25T17:18:10.543 [ DEBUG ] [mpv] decode_wrapper/ad: eac3_eae (eac3) - EAE EAC3
2020-09-25T17:18:10.543 [ DEBUG ] [mpv] decode_wrapper/ad: Opening decoder eac3_mf
2020-09-25T17:18:10.543 [ DEBUG ] [mpv] decode_wrapper/ad: Requesting 1 threads for decoding.
2020-09-25T17:18:10.543 [ ERROR ] [mpv] ffmpeg/audio: eac3_mf: could not find any MFT for the given media type
2020-09-25T17:18:10.543 [ ERROR ] [mpv] ffmpeg/audio: eac3_mf: could not create MFT
2020-09-25T17:18:10.543 [ ERROR ] [mpv] decode_wrapper/ad: Could not open codec.
2020-09-25T17:18:10.544 [ WARN ] [mpv] decode_wrapper/ad: Decoder init failed for eac3_mf
2020-09-25T17:18:10.544 [ DEBUG ] [mpv] decode_wrapper/ad: Opening decoder eac3_eae
2020-09-25T17:18:10.544 [ DEBUG ] [mpv] decode_wrapper/ad: Requesting 1 threads for decoding.
2020-09-25T17:18:10.544 [ ERROR ] [mpv] ffmpeg/audio: eac3_eae: EAE watchfolder is not writable: \\?\C:\Users\Administrator\AppData\Local\Plex\Plex Media Server\Cache\Transcode\Sessions\EasyAudioEncoder\Convert to WAV (to 8ch or less)\frame-10508-0-test.tmp
2020-09-25T17:18:10.544 [ ERROR ] [mpv] decode_wrapper/ad: Could not open codec.
2020-09-25T17:18:10.544 [ WARN ] [mpv] decode_wrapper/ad: Decoder init failed for eac3_eae
2020-09-25T17:18:10.544 [ ERROR ] [mpv] decode_wrapper/ad: Failed to initialize a decoder for codec 'eac3'.
For what it’s worth, I had also already tried modifying write permissions on that folder. Another forum thread (Link) I found suggested the same thing (but it also did not fix the issue for the other poster).
In regards to renaming the Cache folder, I had also tried that prior to posting here with no luck, unfortunately. After becoming frustrated I even uninstalled the app entirely, manually cleared all it’s data from my AppData locations, then reinstalled. Still the same behaviour.
Needless to say, I did my research and attempted many fixes before posting here. But hey, I’m open to trying any suggestion so let me know if anything else comes to mind.
I’m starting to wonder if perhaps my Windows Media Foundation pack is out of date or something…? I’d love a technical Plex expert to chime in and provide some help. I would like to move to ‘Plex for Windows’ on this system to get the new benefits (i.e. skip intro) that are not available on Plex Media Player.