Plex Setting say Server is "Fully accessible outside your network" but getting Playback Error

Server Version#: 1.43.4.10903
Player Version#: Client Version 2026.18.0 Platform Version 26.6.2
Log File attached from my iPhone which wasn’t connected locally and trying to remote in, it was the easiest device for me to get the log file from but its happening on all remote devices. On my dashboard on the actual Plex app that is running on a Synology NAS it says that remote should be fully accessible and its been working perfectly fine for months up until a couple weeks ago.

com.plexapp.plex 2026-09-27–20-56-17-887.log (205.5 KB)