Newly added files do not appear in libraries anymore

HMMMMM,

There is a permissions problem in the PlexMediaServer directory.

Jan 06, 2025 19:39:11.222 [140097319508624] DEBUG - Opening 20 database sessions to library (com.plexapp.plugins.library), SQLite 3.39.4, threadsafe=1
Jan 06, 2025 19:39:11.222 [140097319508624] ERROR - SQLITE3:0x80000001, 14, cannot open file at line 41714 of [a29f994989]
Jan 06, 2025 19:39:11.222 [140097319508624] ERROR - SQLITE3:0x80000001, 14, os_unix.c:41714: (13) open(/volume1/PlexMediaServer/AppData/Plex Media Server/Plug-in Support/Databases/com.plexapp.plugins.library.db) - Permission denied
Jan 06, 2025 19:39:11.222 [140097319508624] ERROR - Promise destroyed without handling exception: Promise fell out of scope without resolving or rejecting

Did you run this as root (sudo bash) ???

Now to fix the file permissions so the DB will open.