Update:
I installed EAC3 codecs onto my Windows 11 server PC. I didn’t notice any changes immediately after, but wanted to mention I did this.
I ran “Analyze” on my entire library. didn’t notice any immediate change on my local network.
I left the house and got my wife to try while remote (Pixel 6), it worked right away. I tried on my Pixel 8 Pro and it worked.
This morning I tried using plex for windows 1.108.1.307-dd5b87aa (different PC than the server), and I immediately get “An error occurred loading items to play.” on all videos, even ones that work on my phone.
I am currently using Brave v1.79.118 and i get the same error occurred issue (Both my PC and server).