Plex is now using extensions to SQLite. So instead of the OS-provided SQLite program, you need to use the one built into Plex.
/path/to/Plex\ Media\ Server --sqlite /path/to/com.plexapp.plugins.library.db
Plex is now using extensions to SQLite. So instead of the OS-provided SQLite program, you need to use the one built into Plex.
/path/to/Plex\ Media\ Server --sqlite /path/to/com.plexapp.plugins.library.db