Hello again and thanks for following up, yeah it’s working again and created a file under the name “com.plexapp.plugins.library.db-2019-06-17”.
But currently I am getting the following error on the QNAP NAS;
Severity Level Date Time Users Source IP Application Category Content
Error 2019/06/21 12:35:36 AM System 127.0.0.1 — — Plex Media Server is currently running or hasn’t been shutdown properly. Please stop it from QNAP AppCenter and start it again.
So I decided to get rid of all databases by deleting all backups alongside with the “-shm” and “-wal”, and yet the same error appear again and again, and server (QNAP) became jammed and can’t access it unless I perform a full restart and check for the file system.
This is a copy from the log after creating fresh database, I don’t know what’s going on again 
